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Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Reflects a 1-for-17 reverse stock split effective October 30, 2023."}],"balance_after":25650,"source":{"system":"sec-edgar","filing":"0001062993-23-021595","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000106299323021595/form4.xml","form_type":"4"}},{"id":1753851,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-10-30T16:12:46.000Z","date":"2023-10-27","kind":"sale","planned":true,"acquired":false,"shares":9175,"price":0.1897,"value":1740.4975,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to the Reporting Person's pre-existing Rule 10b5-1 trading plan to, inter alia, pay tax withholding on vested RSUs."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The sale price represents the weighted average sale price of the shares sold ranging from $0.186 to $0.191 per share.  Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Does not reflect a 1-for-17 reverse stock split effective October 30, 2023."}],"balance_after":439171,"source":{"system":"sec-edgar","filing":"0001062993-23-019823","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000106299323019823/form4.xml","form_type":"4"}},{"id":1793142,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-08-30T16:08:46.000Z","date":"2023-08-29","kind":"sale","planned":true,"acquired":false,"shares":6540,"price":0.4845,"value":3168.63,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to the Reporting Person's pre-existing Rule 10b5-1 trading plan to, inter alia, pay tax withholding on vested RSUs."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The sale price represents the weighted average sale price of the shares sold ranging from $0.4844 to $0.5024 per share.  Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":448346,"source":{"system":"sec-edgar","filing":"0001062993-23-017281","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000106299323017281/form4.xml","form_type":"4"}},{"id":1793141,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-08-30T16:08:46.000Z","date":"2023-08-28","kind":"sale","planned":true,"acquired":false,"shares":7000,"price":0.4931,"value":3451.7,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to the Reporting Person's pre-existing Rule 10b5-1 trading plan to, inter alia, pay tax withholding on vested RSUs."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The sale price represents the weighted average sale price of the shares sold ranging from $0.4767 to $0.5005 per share.  Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":454886,"source":{"system":"sec-edgar","filing":"0001062993-23-017281","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000106299323017281/form4.xml","form_type":"4"}},{"id":1821543,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2023-07-28T16:12:44.000Z","date":"2023-07-26","kind":"tax_withholding","planned":false,"acquired":false,"shares":6272,"price":0.717,"value":4497.024,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares withheld by issuer to satisfy tax withholding obligations of reporting person resulting from vesting of restricted stock units."}],"balance_after":461886,"source":{"system":"sec-edgar","filing":"0001062993-23-015427","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000106299323015427/form4.xml","form_type":"4"}},{"id":1827902,"issuer":{"id":7266,"kind":"organization","name":"Grace Therapeutics, Inc.","symbol":"GRCE"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Options (Right to Buy)","published_at":"2023-07-18T16:37:14.000Z","date":"2023-07-14","kind":"grant","planned":false,"acquired":true,"shares":12500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Stock options granted on 07/14/2023 under the Acasti Pharma Stock Option Plan, which vest and become exercisable in equal monthly installments over a period of 12 months."}],"balance_after":12500,"derivative":{"exercise_price":2.64,"expiration_date":"2033-07-14","underlying":"Class A Common Shares","underlying_shares":12500},"source":{"system":"sec-edgar","filing":"0001062993-23-015000","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809613/000106299323015000/form4.xml","form_type":"4"}},{"id":1911387,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2023-04-28T16:12:20.000Z","date":"2023-04-26","kind":"tax_withholding","planned":false,"acquired":false,"shares":6272,"price":1.61,"value":10097.92,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares withheld by issuer to satisfy tax withholding obligations of reporting person resulting from vesting of restricted stock units."}],"balance_after":468158,"source":{"system":"sec-edgar","filing":"0001104659-23-052962","document":"tm2314131-5_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000110465923052962/tm2314131-5_4seq1.xml","form_type":"4"}},{"id":1919661,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2023-04-14T19:11:22.000Z","date":"2023-04-13","kind":"grant","planned":false,"acquired":true,"shares":150000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Consists of 150,000 restricted stock units (\"RSUs\"). 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Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":324430,"source":{"system":"sec-edgar","filing":"0001104659-23-030758","document":"tm239104d3_4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000110465923030758/tm239104d3_4.xml","form_type":"4"}},{"id":1966250,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2023-03-07T19:17:12.000Z","date":"2023-03-07","kind":"sale","acquired":false,"shares":15134,"price":1.55,"value":23457.7,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to the Reporting Person's pre-existing Rule 10b5-1 trading plan. Shares were sold by the Reporting Person to generate proceeds used to satisfy the tax withholding obligation that arose upon the vesting of restricted stock units granted to the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This sale price represents the weighted average sale price of the shares sold ranging from $1.67 to $1.45 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":326573,"source":{"system":"sec-edgar","filing":"0001104659-23-029720","document":"tm238845-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000110465923029720/tm238845-1_4seq1.xml","form_type":"4"}},{"id":1966249,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2023-03-07T19:17:12.000Z","date":"2023-03-06","kind":"sale","acquired":false,"shares":13828,"price":1.72,"value":23784.16,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to the Reporting Person's pre-existing Rule 10b5-1 trading plan. Shares were sold by the Reporting Person to generate proceeds used to satisfy the tax withholding obligation that arose upon the vesting of restricted stock units granted to the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This sale price represents the weighted average sale price of the shares sold ranging from $1.90 to $1.66 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":341707,"source":{"system":"sec-edgar","filing":"0001104659-23-029720","document":"tm238845-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000110465923029720/tm238845-1_4seq1.xml","form_type":"4"}},{"id":1974332,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2023-03-03T20:10:54.000Z","date":"2023-03-03","kind":"sale","acquired":false,"shares":18968,"price":1.9,"value":36039.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to the Reporting Person's pre-existing Rule 10b5-1 trading plan. Shares were sold by the Reporting Person to generate proceeds used to satisfy the tax withholding obligation that arose upon the vesting of restricted stock units granted to the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This sale price represents the weighted average sale price of the shares sold ranging from $1.98 to $1.84 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":355535,"source":{"system":"sec-edgar","filing":"0001104659-23-028617","document":"tm238562d1_4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000110465923028617/tm238562d1_4.xml","form_type":"4"}},{"id":1974331,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2023-03-03T20:10:54.000Z","date":"2023-03-02","kind":"sale","acquired":false,"shares":10497,"price":1.94,"value":20364.18,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to the Reporting Person's pre-existing Rule 10b5-1 trading plan. Shares were sold by the Reporting Person to generate proceeds used to satisfy the tax withholding obligation that arose upon the vesting of restricted stock units granted to the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This sale price represents the weighted average sale price of the shares sold ranging from $2.09 to $1.87 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":374503,"source":{"system":"sec-edgar","filing":"0001104659-23-028617","document":"tm238562d1_4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000110465923028617/tm238562d1_4.xml","form_type":"4"}},{"id":2148742,"issuer":{"id":7266,"kind":"organization","name":"Grace Therapeutics, Inc.","symbol":"GRCE"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Options (Right to Buy)","published_at":"2022-09-30T16:18:16.000Z","date":"2022-09-28","kind":"grant","acquired":true,"shares":85000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Based on conversion of exercise price of C$0.80 into U.S. dollars based on an exchange rate of C$1.00 = US$0.7321 on the date of grant."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Stock options granted on 09/28/2022 under Acasti Pharma Inc.'s Stock Option Plan and become exercisable evenly and on a quarterly basis over 36 months."}],"balance_after":85000,"derivative":{"exercise_price":0.59,"expiration_date":"2032-09-28","underlying":"Class A Common Shares","underlying_shares":85000},"source":{"system":"sec-edgar","filing":"0001171843-22-006332","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809613/000117184322006332/ownership.xml","form_type":"4"}},{"id":2169069,"issuer":{"id":93047,"kind":"organization","name":"PaxMedica, Inc.","symbol":"PXMD"},"owners":[{"id":107895,"kind":"person","name":"Derby Michael","position":1,"cik":"0001809613","reported_name":"Derby Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2022-09-01T16:06:42.000Z","date":"2022-08-30","kind":"purchase","acquired":true,"shares":95000,"price":5.25,"value":498750.0,"ownership":{"direct":false,"nature":"TardiMed Sciences, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"These shares were purchased from the underwriters by TardiMed Sciences, LLC (\"TardiMed\") in the issuer's initial public offering, which closed on August 30, 2022. See footnote 3 for the reporting person's relationship to TardiMed."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The reporting person is the Managing Partner of TardiMed and has sole voting and dispositive control over the shares of Common Stock held by the entity. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein."}],"balance_after":7336745,"source":{"system":"sec-edgar","filing":"0001104659-22-097017","document":"tm2224962-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811623/000110465922097017/tm2224962-1_4seq1.xml","form_type":"4"}}]}