{"cik":1253689,"taxonomy":"us-gaap","tag":"EarningsPerShareBasicAndDiluted","label":"Earnings Per Share, Basic and Diluted","description":"The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.","entityName":"Crescent Biopharma, Inc.","units":{"USD/shares":[{"start":"2013-01-01","end":"2013-09-30","val":-6.5,"accn":"0001193125-14-391030","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":-3,"accn":"0001193125-14-391030","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-8.87,"accn":"0001558370-16-003688","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-0.3,"accn":"0001193125-15-172196","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-09-30","val":-0.2,"accn":"0001193125-14-391030","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-10-31"},{"start":"2014-01-01","end":"2014-09-30","val":-0.2,"accn":"0001558370-15-002591","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-0.35,"accn":"0001193125-14-391030","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-10-31"},{"start":"2014-07-01","end":"2014-09-30","val":-0.35,"accn":"0001558370-15-002591","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-0.6,"accn":"0001558370-16-003688","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29"},{"start":"2014-01-01","end":"2014-12-31","val":-0.6,"accn":"0001558370-17-001198","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-0.37,"accn":"0001193125-15-172196","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05"},{"start":"2015-01-01","end":"2015-03-31","val":-0.37,"accn":"0001558370-16-005254","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-04","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-09-30","val":-0.2,"accn":"0001558370-15-002591","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":-0.2,"accn":"0001558370-16-009291","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-04"},{"start":"2015-07-01","end":"2015-09-30","val":-0.38,"accn":"0001558370-15-002591","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":-0.38,"accn":"0001558370-16-009291","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-04","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":-0.67,"accn":"0001558370-16-003688","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29"},{"start":"2015-01-01","end":"2015-12-31","val":-0.67,"accn":"0001558370-17-001198","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"start":"2015-01-01","end":"2015-12-31","val":-0.67,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-0.4,"accn":"0001558370-16-005254","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-04"},{"start":"2016-01-01","end":"2016-03-31","val":-0.4,"accn":"0001558370-17-001198","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"start":"2016-01-01","end":"2016-03-31","val":-0.4,"accn":"0001558370-17-003731","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"start":"2016-01-01","end":"2016-03-31","val":-0.4,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-0.8,"accn":"0001558370-17-005782","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03"},{"start":"2016-04-01","end":"2016-06-30","val":-0.41,"accn":"0001558370-17-001198","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"start":"2016-04-01","end":"2016-06-30","val":-0.41,"accn":"0001558370-17-005782","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03"},{"start":"2016-04-01","end":"2016-06-30","val":-0.41,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-1.14,"accn":"0001558370-16-009291","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-04"},{"start":"2016-01-01","end":"2016-09-30","val":-1.14,"accn":"0001558370-17-008486","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-08"},{"start":"2016-07-01","end":"2016-09-30","val":-0.34,"accn":"0001558370-16-009291","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-04"},{"start":"2016-07-01","end":"2016-09-30","val":-0.34,"accn":"0001558370-17-001198","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"start":"2016-07-01","end":"2016-09-30","val":-0.34,"accn":"0001558370-17-008486","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-08"},{"start":"2016-07-01","end":"2016-09-30","val":-0.34,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-1.5,"accn":"0001558370-17-001198","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"start":"2016-01-01","end":"2016-12-31","val":-1.5,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06"},{"start":"2016-01-01","end":"2016-12-31","val":-1.5,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":-0.36,"accn":"0001558370-17-001198","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"start":"2016-10-01","end":"2016-12-31","val":-0.36,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06","frame":"CY2016Q4"},{"start":"2017-01-01","end":"2017-03-31","val":-0.34,"accn":"0001558370-17-003731","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"start":"2017-01-01","end":"2017-03-31","val":-0.34,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06"},{"start":"2017-01-01","end":"2017-03-31","val":-0.34,"accn":"0001558370-18-003836","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-03"},{"start":"2017-01-01","end":"2017-03-31","val":-0.34,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-0.63,"accn":"0001558370-17-005782","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03"},{"start":"2017-01-01","end":"2017-06-30","val":-0.63,"accn":"0001558370-18-006888","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-09"},{"start":"2017-04-01","end":"2017-06-30","val":-0.3,"accn":"0001558370-17-005782","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03"},{"start":"2017-04-01","end":"2017-06-30","val":-0.3,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06"},{"start":"2017-04-01","end":"2017-06-30","val":-0.3,"accn":"0001558370-18-006888","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-09"},{"start":"2017-04-01","end":"2017-06-30","val":-0.3,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":-0.86,"accn":"0001558370-17-008486","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-08"},{"start":"2017-01-01","end":"2017-09-30","val":-0.86,"accn":"0001558370-18-008314","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-02"},{"start":"2017-07-01","end":"2017-09-30","val":-0.24,"accn":"0001558370-17-008486","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-08"},{"start":"2017-07-01","end":"2017-09-30","val":-0.24,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06"},{"start":"2017-07-01","end":"2017-09-30","val":-0.24,"accn":"0001558370-18-008314","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-02"},{"start":"2017-07-01","end":"2017-09-30","val":-0.24,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":-1.13,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06"},{"start":"2017-01-01","end":"2017-12-31","val":-1.13,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06"},{"start":"2017-01-01","end":"2017-12-31","val":-1.13,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-31","val":-0.27,"accn":"0001558370-18-001553","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-06"},{"start":"2017-10-01","end":"2017-12-31","val":-0.27,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06","frame":"CY2017Q4"},{"start":"2018-01-01","end":"2018-03-31","val":-0.33,"accn":"0001558370-18-003836","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-03"},{"start":"2018-01-01","end":"2018-03-31","val":-0.33,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06"},{"start":"2018-01-01","end":"2018-03-31","val":-0.33,"accn":"0001558370-19-003803","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-02"},{"start":"2018-01-01","end":"2018-03-31","val":-0.26,"accn":"0001558370-19-006741","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-01"},{"start":"2018-01-01","end":"2018-03-31","val":-0.33,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-0.58,"accn":"0001558370-18-006888","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-09"},{"start":"2018-01-01","end":"2018-06-30","val":-0.58,"accn":"0001558370-19-006741","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-01"},{"start":"2018-04-01","end":"2018-06-30","val":-0.26,"accn":"0001558370-18-006888","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":-0.26,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06"},{"start":"2018-04-01","end":"2018-06-30","val":-0.26,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":-0.85,"accn":"0001558370-18-008314","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-02"},{"start":"2018-01-01","end":"2018-09-30","val":-0.85,"accn":"0001558370-19-010290","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":-0.27,"accn":"0001558370-18-008314","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-02"},{"start":"2018-07-01","end":"2018-09-30","val":-0.27,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06"},{"start":"2018-07-01","end":"2018-09-30","val":-0.27,"accn":"0001558370-19-010290","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":-0.27,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":-1.18,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06"},{"start":"2018-01-01","end":"2018-12-31","val":-1.18,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-1.18,"accn":"0001558370-21-002222","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-02","frame":"CY2018"},{"start":"2018-10-01","end":"2018-12-31","val":-0.32,"accn":"0001558370-19-001537","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-06"},{"start":"2018-10-01","end":"2018-12-31","val":-0.32,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28","frame":"CY2018Q4"},{"start":"2019-01-01","end":"2019-03-31","val":-0.33,"accn":"0001558370-19-003803","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-02"},{"start":"2019-01-01","end":"2019-03-31","val":-0.37,"accn":"0001558370-19-006741","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-01"},{"start":"2019-01-01","end":"2019-03-31","val":-0.33,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28"},{"start":"2019-01-01","end":"2019-03-31","val":-0.33,"accn":"0001558370-20-004879","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-01","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-0.69,"accn":"0001558370-19-006741","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-01"},{"start":"2019-01-01","end":"2019-06-30","val":-0.69,"accn":"0001558370-20-008841","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-07-31"},{"start":"2019-04-01","end":"2019-06-30","val":-0.37,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28"},{"start":"2019-04-01","end":"2019-06-30","val":-0.37,"accn":"0001558370-20-008841","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-07-31","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":-1,"accn":"0001558370-19-010290","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":-1,"accn":"0001558370-20-013021","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-06"},{"start":"2019-07-01","end":"2019-09-30","val":-0.31,"accn":"0001558370-19-010290","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":-0.31,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28"},{"start":"2019-07-01","end":"2019-09-30","val":-0.31,"accn":"0001558370-20-013021","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-06","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":-1.34,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28"},{"start":"2019-01-01","end":"2019-12-31","val":-1.34,"accn":"0001558370-21-002222","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-02","frame":"CY2019"},{"start":"2019-10-01","end":"2019-12-31","val":-0.34,"accn":"0001558370-20-001723","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-28","frame":"CY2019Q4"},{"start":"2020-01-01","end":"2020-03-31","val":-0.18,"accn":"0001558370-20-004879","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-01"},{"start":"2020-01-01","end":"2020-03-31","val":-0.18,"accn":"0001558370-21-005473","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-03","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-0.5,"accn":"0001558370-20-008841","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-07-31"},{"start":"2020-01-01","end":"2020-06-30","val":-0.5,"accn":"0001558370-21-010410","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-0.32,"accn":"0001558370-20-008841","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-07-31"},{"start":"2020-04-01","end":"2020-06-30","val":-0.32,"accn":"0001558370-21-010410","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-0.79,"accn":"0001558370-20-013021","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-06"},{"start":"2020-01-01","end":"2020-09-30","val":-0.79,"accn":"0001558370-21-014003","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-02"},{"start":"2020-07-01","end":"2020-09-30","val":-0.29,"accn":"0001558370-20-013021","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-06"},{"start":"2020-07-01","end":"2020-09-30","val":-0.29,"accn":"0001558370-21-014003","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-02","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-1.12,"accn":"0001558370-21-002222","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-02","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-0.28,"accn":"0001558370-21-005473","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-03","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-0.56,"accn":"0001558370-21-010410","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":-0.28,"accn":"0001558370-21-010410","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-0.9,"accn":"0001558370-21-014003","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-02"},{"start":"2021-07-01","end":"2021-09-30","val":-0.34,"accn":"0001558370-21-014003","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-02","frame":"CY2021Q3"}]}}