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the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"},{"field":"kind","element":"transactionCoding","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"}],"balance_after":643,"derivative":{"underlying":"Common Stock","underlying_shares":643},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":20,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982256,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Phantom 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Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"}],"balance_after":0,"derivative":{"underlying":"Class A Common 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Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":19022.18},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982249,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Phantom Stock","published_at":"2018-03-27T17:30:01.000Z","date":"2017-04-11","kind":"other","acquired":false,"shares":102.82,"price":1.55,"value":159.371,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"On March 31, 2017, 13,660.71 Phantom Stock units were credited to the reporting person under the Excess Plan.  However, it was later determined that 102.82 units of those Phantom Stock units previously credited were incorrectly credited to the reporting person's account due to a payroll error.  Accordingly, on April 11, 2017, 102.82 Phantom Stock units were deducted from the reporting person's account."},{"field":"kind","element":"transactionCoding","label":"F6","text":"On March 31, 2017, 13,660.71 Phantom Stock units were credited to the reporting person under the Excess Plan.  However, it was later determined that 102.82 units of those Phantom Stock units previously credited were incorrectly credited to the reporting person's account due to a payroll error.  Accordingly, on April 11, 2017, 102.82 Phantom Stock units were deducted from the reporting person's account."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"On March 31, 2017, 13,660.71 Phantom Stock units were credited to the reporting person under the Excess Plan.  However, it was later determined that 102.82 units of those Phantom Stock units previously credited were incorrectly credited to the reporting person's account due to a payroll error.  Accordingly, on April 11, 2017, 102.82 Phantom Stock units were deducted from the reporting person's account."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"On March 31, 2017, 13,660.71 Phantom Stock units were credited to the reporting person under the Excess Plan.  However, it was later determined that 102.82 units of those Phantom Stock units previously credited were incorrectly credited to the reporting person's account due to a payroll error.  Accordingly, on April 11, 2017, 102.82 Phantom Stock units were deducted from the reporting person's account."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":102.82},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982248,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Phantom Stock","published_at":"2018-03-27T17:30:01.000Z","date":"2017-03-31","kind":"grant","acquired":true,"shares":13660.71,"price":0.35,"value":4781.2485,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":13660.71},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982247,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Phantom Stock","published_at":"2018-03-27T17:30:01.000Z","date":"2017-03-15","kind":"grant","acquired":true,"shares":11953.13,"price":0.4,"value":4781.252,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":11953.13},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982246,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Phantom Stock","published_at":"2018-03-27T17:30:01.000Z","date":"2017-02-28","kind":"grant","acquired":true,"shares":3415.18,"price":1.4,"value":4781.252,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":3415.18},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982245,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Phantom Stock","published_at":"2018-03-27T17:30:01.000Z","date":"2017-02-15","kind":"grant","acquired":true,"shares":3415.18,"price":1.4,"value":4781.252,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":3415.18},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982244,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Phantom Stock","published_at":"2018-03-27T17:30:01.000Z","date":"2017-01-31","kind":"grant","acquired":true,"shares":2812.5,"price":1.7,"value":4781.25,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":2812.5},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982243,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Phantom Stock","published_at":"2018-03-27T17:30:01.000Z","date":"2017-01-13","kind":"grant","acquired":true,"shares":3677.88,"price":1.3,"value":4781.244,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Phantom Stock units credited under the Excess Plan. Participants are always 100% vested in their contributions to the Excess Plan. Employer contributions vest according to the provisions of the Excess Plan, which is generally based on years of service (20% per year of credited service); participant is 100% vested after 5 years of credited service."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":3677.88},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982242,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Warrants (rights to buy)","published_at":"2018-03-27T17:30:01.000Z","date":"2017-11-14","kind":"other","acquired":true,"shares":6949,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On the Effective Date and pursuant to the Plan, the reporting person's 237,032 shares of Predecessor Common Stock underlying the Phantom Stock units held in a \"Rabbi\" trust to hold the stock portion of the reporting person's benefits under the Issuer's Executive Nonqualified Excess Plan (the \"Excess Plan\") were cancelled in exchange for 643 Phantom Stock units and 6,949 New Existing Equity Warrants"}],"balance_after":14245,"derivative":{"exercise_price":100,"underlying":"Common Stock","underlying_shares":6949},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982241,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Warrants (rights to buy)","published_at":"2018-03-27T17:30:01.000Z","date":"2017-11-14","kind":"other","acquired":true,"shares":7296,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Effective November 14, 2017 (the \"Effective Date\"), the Issuer emerged from bankruptcy pursuant to a Chapter 11 Plan (the \"Plan\")."},{"field":"kind","element":"transactionCoding","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 248,898 shares of Predecessor Common Stock were canceled and he received 675 Shares and New Existing Equity Warrants to purchase 7,296 Shares."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 248,898 shares of Predecessor Common Stock were canceled and he received 675 Shares and New Existing Equity Warrants to purchase 7,296 Shares."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 248,898 shares of Predecessor Common Stock were canceled and he received 675 Shares and New Existing Equity Warrants to purchase 7,296 Shares."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 248,898 shares of Predecessor Common Stock were canceled and he received 675 Shares and New Existing Equity Warrants to purchase 7,296 Shares."}],"balance_after":7296,"derivative":{"exercise_price":100,"underlying":"Common Stock","underlying_shares":7296},"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982240,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Common Stock, $0.01 par value","published_at":"2018-03-27T17:30:01.000Z","date":"2017-11-14","kind":"other","acquired":true,"shares":675,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Effective November 14, 2017 (the \"Effective Date\"), the Issuer emerged from bankruptcy pursuant to a Chapter 11 Plan (the \"Plan\")."},{"field":"kind","element":"transactionCoding","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 248,898 shares of Predecessor Common Stock were canceled and he received 675 Shares and New Existing Equity Warrants to purchase 7,296 Shares."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 248,898 shares of Predecessor Common Stock were canceled and he received 675 Shares and New Existing Equity Warrants to purchase 7,296 Shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982239,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Class A Common Stock, $0.01 par value","published_at":"2018-03-27T17:30:01.000Z","date":"2017-11-14","kind":"other","acquired":false,"shares":248898,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Effective November 14, 2017 (the \"Effective Date\"), the Issuer emerged from bankruptcy pursuant to a Chapter 11 Plan (the \"Plan\")."},{"field":"kind","element":"transactionCoding","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 248,898 shares of Predecessor Common Stock were canceled and he received 675 Shares and New Existing Equity Warrants to purchase 7,296 Shares."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 248,898 shares of Predecessor Common Stock were canceled and he received 675 Shares and New Existing Equity Warrants to purchase 7,296 Shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":3982238,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Class A Common Stock, $0.01 par value","published_at":"2018-03-27T17:30:01.000Z","date":"2017-10-06","kind":"tax_withholding","acquired":false,"shares":40214,"price":0.183,"value":7359.162,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Transaction was a withholding and sale by the Issuer of a portion of vested restricted Class A Common Stock, $0.01 par value per share, of the Issuer outstanding immediately prior to the Effective Date (\"Predecessor Common Stock\"), to satisfy the reporting person's tax obligations upon the immediate vesting of such shares in anticipation of the Issuer's emergence from bankruptcy."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001437749-18-005599","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005599/rdgdoc.xml","form_type":"5"}},{"id":4370619,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2017-03-28T18:55:11.000Z","date":"2017-03-27","kind":"tax_withholding","acquired":false,"shares":24525,"price":0.365,"value":8951.625,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Transaction was a withholding of portion of vested restricted share units to satisfy the reporting person's tax withholding obligations upon vesting, pursuant to the award agreement and associated equity incentive plan under which the award was granted."}],"balance_after":289112,"source":{"system":"sec-edgar","filing":"0001437749-17-005453","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917005453/rdgdoc.xml","form_type":"4"}},{"id":4492338,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Phantom Stock","published_at":"2017-01-12T19:18:32.000Z","date":"2016-12-30","kind":"grant","acquired":true,"shares":2732.14,"price":1.75,"value":4781.245,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). 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Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."}],"balance_after":58406.36,"derivative":{"underlying":"Common Stock","underlying_shares":1292.23},"source":{"system":"sec-edgar","filing":"0001437749-17-000617","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917000617/rdgdoc.xml","form_type":"5"}},{"id":4492324,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":56724,"kind":"person","name":"Kneen Quintin","position":1,"cik":"0001391071","reported_name":"Kneen Quintin","relationship":{"officer":true,"officer_title":"President & CEO"}}],"security":"Phantom Stock","published_at":"2017-01-12T19:18:32.000Z","date":"2016-05-31","kind":"grant","acquired":true,"shares":1475.69,"price":3.24,"value":4781.2356,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."}],"balance_after":57114.13,"derivative":{"underlying":"Common Stock","underlying_shares":1475.69},"source":{"system":"sec-edgar","filing":"0001437749-17-000617","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917000617/rdgdoc.xml","form_type":"5"}}],"next_cursor":"2017-01-12T19:18:32.000000Z,4492324"}