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One remaining equal vesting will occur on June 10, 2023, subject to the reporting person's continued employment with the issuer on each such vesting date.  Each restricted stock unit represents the right to receive on share of the issuer's common stock upon vesting."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"This is the second vesting of the restricted stock units issued on October 5, 2020.  One remaining equal vesting will occur on June 10, 2023, subject to the reporting person's continued employment with the issuer on each such vesting date.  Each restricted stock unit represents the right to receive on share of the issuer's common stock upon vesting."}],"balance_after":12500,"derivative":{"underlying":"Common Stock","underlying_shares":12500},"source":{"system":"sec-edgar","filing":"0001209191-22-036735","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1101680/000120919122036735/doc4.xml","form_type":"4"}},{"id":2232984,"issuer":{"id":17724,"kind":"organization","name":"DZS INC.","symbol":"DZSI"},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2022-06-14T16:59:15.000Z","date":"2022-06-10","kind":"tax_withholding","acquired":false,"shares":4028,"price":17.8,"value":71698.4,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Shares withheld by DZS to satisfy tax withholding requirements on vesting of restricted stock units."}],"balance_after":16934,"source":{"system":"sec-edgar","filing":"0001209191-22-036735","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1101680/000120919122036735/doc4.xml","form_type":"4"}},{"id":2232983,"issuer":{"id":17724,"kind":"organization","name":"DZS INC.","symbol":"DZSI"},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2022-06-14T16:59:15.000Z","date":"2022-06-10","kind":"exercise","acquired":true,"shares":12500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This is the second vesting of the restricted stock units issued on October 5, 2020.  One remaining equal vesting will occur on June 10, 2023, subject to the reporting person's continued employment with the issuer on each such vesting date.  Each restricted stock unit represents the right to receive on share of the issuer's common stock upon vesting."}],"balance_after":20962,"source":{"system":"sec-edgar","filing":"0001209191-22-036735","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1101680/000120919122036735/doc4.xml","form_type":"4"}},{"id":2249835,"issuer":{"id":17724,"kind":"organization","name":"DZS INC.","symbol":"DZSI"},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Units","published_at":"2022-06-01T16:17:14.000Z","date":"2022-05-30","kind":"grant","acquired":true,"shares":5517,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in one equal installments on May 30, 2023, subject to the reporting person's continued employment with the issuer on the vesting date. Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in one equal installments on May 30, 2023, subject to the reporting person's continued employment with the issuer on the vesting date. Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in one equal installments on May 30, 2023, subject to the reporting person's continued employment with the issuer on the vesting date. Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in one equal installments on May 30, 2023, subject to the reporting person's continued employment with the issuer on the vesting date. Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."}],"balance_after":5517,"derivative":{"underlying":"Common Stock","underlying_shares":5517},"source":{"system":"sec-edgar","filing":"0001209191-22-033147","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1101680/000120919122033147/doc4.xml","form_type":"4"}},{"id":2549731,"issuer":{"id":17724,"kind":"organization","name":"DZS INC.","symbol":"DZSI"},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Units","published_at":"2021-10-05T12:57:03.000Z","date":"2021-10-01","kind":"grant","acquired":true,"shares":20000,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in three equal installments on October 1, 2022, 2023 and 2024, subject to the reporting person's continued employment with the issuer on each vesting date. Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in three equal installments on October 1, 2022, 2023 and 2024, subject to the reporting person's continued employment with the issuer on each vesting date. Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in three equal installments on October 1, 2022, 2023 and 2024, subject to the reporting person's continued employment with the issuer on each vesting date. Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in three equal installments on October 1, 2022, 2023 and 2024, subject to the reporting person's continued employment with the issuer on each vesting date. Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."}],"balance_after":20000,"derivative":{"underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0001209191-21-059270","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1101680/000120919121059270/doc4.xml","form_type":"4"}},{"id":2641789,"issuer":{"id":17724,"kind":"organization","name":"DZS INC.","symbol":"DZSI"},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2021-07-06T12:41:54.000Z","date":"2021-07-01","kind":"grant","acquired":true,"shares":10000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"These options, were granted pursuant to the issuer's 2017 Incentive Award Plan and  will vest over a four year vesting schedule as follows:  25% of the options will vest on July 1, 2022 and the remainder will vest in 36 equal monthly installments thereafter subject to the reporting person's continued employment with the issuer on each vesting date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"These options, were granted pursuant to the issuer's 2017 Incentive Award Plan and  will vest over a four year vesting schedule as follows:  25% of the options will vest on July 1, 2022 and the remainder will vest in 36 equal monthly installments thereafter subject to the reporting person's continued employment with the issuer on each vesting date."}],"balance_after":10000,"derivative":{"exercise_price":20.9,"expiration_date":"2031-07-01","underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001209191-21-045278","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1101680/000120919121045278/doc4.xml","form_type":"4"}},{"id":2641788,"issuer":{"id":17724,"kind":"organization","name":"DZS INC.","symbol":"DZSI"},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Units","published_at":"2021-07-06T12:41:54.000Z","date":"2021-07-01","kind":"grant","acquired":true,"shares":10000,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in four equal installments on July 1, 2022, 2023, 2024 and 2025, subject to the reporting person's continued employment with the issuer on each vesting date.  Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in four equal installments on July 1, 2022, 2023, 2024 and 2025, subject to the reporting person's continued employment with the issuer on each vesting date.  Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in four equal installments on July 1, 2022, 2023, 2024 and 2025, subject to the reporting person's continued employment with the issuer on each vesting date.  Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in four equal installments on July 1, 2022, 2023, 2024 and 2025, subject to the reporting person's continued employment with the issuer on each vesting date.  Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting."}],"balance_after":10000,"derivative":{"underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001209191-21-045278","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1101680/000120919121045278/doc4.xml","form_type":"4"}},{"id":2670616,"issuer":{"id":17724,"kind":"organization","name":"DZS INC.","symbol":"DZSI"},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Units","published_at":"2021-06-14T17:19:24.000Z","date":"2021-06-10","kind":"exercise","acquired":false,"shares":12500,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"This is the first vesting of the restricted stock units issued on October 5, 2020.  Two remaining equal vestings will occur on June 10, 2022 and 2023, subject to the reporting person's continued employment with the issuer on each such vesting date.  Each restricted stock unit represents the right to receive on share of the issuer's common stock upon vesting."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This is the first vesting of the restricted stock units issued on October 5, 2020.  Two remaining equal vestings will occur on June 10, 2022 and 2023, subject to the reporting person's continued employment with the issuer on each such vesting date.  Each restricted stock unit represents the right to receive on share of the issuer's common stock upon vesting."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This is the first vesting of the restricted stock units issued on October 5, 2020.  Two remaining equal vestings will occur on June 10, 2022 and 2023, subject to the reporting person's continued employment with the issuer on each such vesting date.  Each restricted stock unit represents the right to receive on share of the issuer's common stock upon vesting."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"This is the first vesting of the restricted stock units issued on October 5, 2020.  Two remaining equal vestings will occur on June 10, 2022 and 2023, subject to the reporting person's continued employment with the issuer on each such vesting date.  Each restricted stock unit represents the right to receive on share of the issuer's common stock upon vesting."}],"balance_after":25000,"derivative":{"underlying":"Common Stock","underlying_shares":12500},"source":{"system":"sec-edgar","filing":"0001209191-21-040283","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1101680/000120919121040283/doc4.xml","form_type":"4"}},{"id":2670615,"issuer":{"id":17724,"kind":"organization","name":"DZS INC.","symbol":"DZSI"},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2021-06-14T17:19:24.000Z","date":"2021-06-10","kind":"tax_withholding","acquired":false,"shares":4038,"price":19.97,"value":80638.86,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Shares withheld by DZS to satisfy tax withholding requirements on vesting of restricted stock units."}],"balance_after":8462,"source":{"system":"sec-edgar","filing":"0001209191-21-040283","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1101680/000120919121040283/doc4.xml","form_type":"4"}},{"id":2670614,"issuer":{"id":17724,"kind":"organization","name":"DZS INC.","symbol":"DZSI"},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2021-06-14T17:19:24.000Z","date":"2021-06-10","kind":"exercise","acquired":true,"shares":12500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This is the first vesting of the restricted stock units issued on October 5, 2020.  Two remaining equal vestings will occur on June 10, 2022 and 2023, subject to the reporting person's continued employment with the issuer on each such vesting date.  Each restricted stock unit represents the right to receive on share of the issuer's common stock upon vesting."}],"balance_after":12500,"source":{"system":"sec-edgar","filing":"0001209191-21-040283","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1101680/000120919121040283/doc4.xml","form_type":"4"}},{"id":3103873,"issuer":{"id":5785,"kind":"organization","name":"Ribbon Communications Inc."},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Restricted Stock Units (RSUs)","published_at":"2020-06-19T16:56:46.000Z","date":"2020-06-17","kind":"exercise","acquired":false,"shares":23450,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These RSUs convert into common stock on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"70,347 RSUs were granted to the Reporting Person on June 17, 2019 and vest over a three-year period. One-third of the RSUs vested on June 17, 2020 and the remainder of the RSUs will vest in four equal, semi-annual installments thereafter through June 17, 2022."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"70,347 RSUs were granted to the Reporting Person on June 17, 2019 and vest over a three-year period. One-third of the RSUs vested on June 17, 2020 and the remainder of the RSUs will vest in four equal, semi-annual installments thereafter through June 17, 2022."}],"balance_after":46897,"derivative":{"underlying":"Common Stock","underlying_shares":23450},"source":{"system":"sec-edgar","filing":"0001708055-20-000106","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1655819/000170805520000106/edgar.xml","form_type":"4"}},{"id":3103872,"issuer":{"id":5785,"kind":"organization","name":"Ribbon Communications Inc."},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Common 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(RSU) represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest over a three-year period as follows: one-third of the restricted stock units shall vest on March 16, 2021, and thereafter, one-sixth of the remaining RSUs will vest every six months, subject to the Reporting Person's continued employment with the Issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vest over a three-year period as follows: one-third of the restricted stock units shall vest on March 16, 2021, and thereafter, one-sixth of the remaining RSUs will vest every six months, subject to the Reporting Person's continued employment with the Issuer."}],"balance_after":150463,"derivative":{"underlying":"Common 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The number of RSUs was determined based on the Issuer's calculation of its 2019 pre-bonus adjusted EBITDA metric compared to pre-established goals that were set by the Compensation Committee (the \"Compensation Committee\") of the Issuer's Board of Directors."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On February 11, 2020, the Compensation Committee determined that the 2019 pre-bonus adjusted EBITDA metric was achieved at the 30.493% level, subject to no material changes in connection with the finalization of the 2019 audit and the filing of the Issuer's Annual Report on Form 10-K for the year ended December 31, 2019 (the \"2019 Form 10-K\").  The 2019 Form 10-K was filed with the U.S. Securities and Exchange Commission on February 28, 2020.  As a result, Mr. Ferguson earned 3,797 shares, pending his continued employment with the Issuer through March 15, 2022."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"On February 11, 2020, the Compensation Committee determined that the 2019 pre-bonus adjusted EBITDA metric was achieved at the 30.493% level, subject to no material changes in connection with the finalization of the 2019 audit and the filing of the Issuer's Annual Report on Form 10-K for the year ended December 31, 2019 (the \"2019 Form 10-K\").  The 2019 Form 10-K was filed with the U.S. Securities and Exchange Commission on February 28, 2020.  As a result, Mr. Ferguson earned 3,797 shares, pending his continued employment with the Issuer through March 15, 2022."}],"balance_after":3797,"derivative":{"underlying":"Common Stock","underlying_shares":3797},"source":{"system":"sec-edgar","filing":"0001708055-20-000035","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1655819/000170805520000035/edgar.xml","form_type":"4"}},{"id":3390841,"issuer":{"id":5785,"kind":"organization","name":"Ribbon Communications Inc."},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin K.","position":1,"cik":"0001655819","reported_name":"Ferguson Justin K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Common 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in four equal, semi-annual installments thereafter through June 17, 2022."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The restricted stock units vest over a three-year period as follows: one-third of the restricted stock units shall vest on June 17, 2020, and the remaining two-thirds of the restricted stock units shall vest in four equal, semi-annual installments thereafter through June 17, 2022."}],"balance_after":70347,"derivative":{"underlying":"Common Stock","underlying_shares":70347},"source":{"system":"sec-edgar","filing":"0001655819-19-000006","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1655819/000165581919000006/edgar.xml","form_type":"4"}},{"id":3553239,"issuer":{"id":5785,"kind":"organization","name":"Ribbon Communications Inc."},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin 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The aggregate number of shares issued may range from zero (0) shares to 200% of the target number of shares reported in columns 5, 7 and 9 of Table II.  The number of PSUs reported in columns 5, 7 and 9 of Table II reflects achievement at the target level of performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Between zero (0) and 200% of one-third of the PSUs will vest, if at all, as determined by the Compensation Committee after the TSR performance period, commencing on January 1, 2019 and ending on December 31, 2021."}],"balance_after":24905,"derivative":{"expiration_date":"2021-12-31","underlying":"Common Stock","underlying_shares":24905},"source":{"system":"sec-edgar","filing":"0001655819-19-000002","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1655819/000165581919000002/edgar.xml","form_type":"4"}},{"id":3585592,"issuer":{"id":5785,"kind":"organization","name":"Ribbon Communications Inc."},"owners":[{"id":87139,"kind":"person","name":"Ferguson Justin 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