{"cik":1453687,"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":"Cartesian Therapeutics, Inc.","units":{"USD/shares":[{"start":"2014-01-01","end":"2014-12-31","val":-7.84,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-3.43,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-7.36,"accn":"0001558370-16-007812","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"start":"2015-04-01","end":"2015-06-30","val":-3.93,"accn":"0001558370-16-007812","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"start":"2015-04-01","end":"2015-06-30","val":-3.93,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":-10.86,"accn":"0001453687-16-000011","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-10"},{"start":"2015-07-01","end":"2015-09-30","val":-3.5,"accn":"0001453687-16-000011","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-10"},{"start":"2015-07-01","end":"2015-09-30","val":-3.5,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":-15.13,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":-15.13,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15","frame":"CY2015"},{"start":"2015-10-01","end":"2015-12-31","val":-4.26,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28","frame":"CY2015Q4"},{"start":"2016-01-01","end":"2016-03-31","val":-4.52,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28"},{"start":"2016-01-01","end":"2016-03-31","val":-4.52,"accn":"0001453687-17-000032","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":-4.52,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-6.9,"accn":"0001558370-16-007812","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"start":"2016-01-01","end":"2016-06-30","val":-6.9,"accn":"0001453687-17-000053","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-2.75,"accn":"0001558370-16-007812","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"start":"2016-04-01","end":"2016-06-30","val":-2.75,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28"},{"start":"2016-04-01","end":"2016-06-30","val":-2.75,"accn":"0001453687-17-000053","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-2.75,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-3.39,"accn":"0001453687-16-000011","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-10"},{"start":"2016-01-01","end":"2016-09-30","val":-3.39,"accn":"0001453687-17-000065","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"start":"2016-07-01","end":"2016-09-30","val":-0.43,"accn":"0001453687-16-000011","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-10"},{"start":"2016-07-01","end":"2016-09-30","val":-0.43,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28"},{"start":"2016-07-01","end":"2016-09-30","val":-0.43,"accn":"0001453687-17-000065","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"start":"2016-07-01","end":"2016-09-30","val":-0.43,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-3.89,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28"},{"start":"2016-01-01","end":"2016-12-31","val":-3.89,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15"},{"start":"2016-01-01","end":"2016-12-31","val":-3.89,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":-0.77,"accn":"0001453687-17-000014","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28"},{"start":"2016-10-01","end":"2016-12-31","val":-0.77,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15","frame":"CY2016Q4"},{"start":"2017-01-01","end":"2017-03-31","val":-0.82,"accn":"0001453687-17-000032","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-11"},{"start":"2017-01-01","end":"2017-03-31","val":-0.82,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15"},{"start":"2017-01-01","end":"2017-03-31","val":-0.82,"accn":"0001453687-18-000030","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-03-31","val":-0.82,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-1.67,"accn":"0001453687-17-000053","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":-1.67,"accn":"0001453687-18-000052","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":-0.85,"accn":"0001453687-17-000053","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":-0.85,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15"},{"start":"2017-04-01","end":"2017-06-30","val":-0.85,"accn":"0001453687-18-000052","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":-0.85,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":-2.31,"accn":"0001453687-17-000065","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"start":"2017-01-01","end":"2017-09-30","val":-2.31,"accn":"0001453687-18-000080","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08"},{"start":"2017-07-01","end":"2017-09-30","val":-0.66,"accn":"0001453687-17-000065","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":-0.66,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15"},{"start":"2017-07-01","end":"2017-09-30","val":-0.66,"accn":"0001453687-18-000080","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08"},{"start":"2017-07-01","end":"2017-09-30","val":-0.66,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":-3.2,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15"},{"start":"2017-01-01","end":"2017-12-31","val":-3.2,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15"},{"start":"2017-01-01","end":"2017-12-31","val":-3.2,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-31","val":-0.88,"accn":"0001453687-18-000012","fy":2017,"fp":"Q4","form":"10-K","filed":"2018-03-15"},{"start":"2017-10-01","end":"2017-12-31","val":-0.88,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15","frame":"CY2017Q4"},{"start":"2018-01-01","end":"2018-03-31","val":-0.71,"accn":"0001453687-18-000030","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-0.71,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15"},{"start":"2018-01-01","end":"2018-03-31","val":-0.71,"accn":"0001453687-19-000053","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-0.71,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-1.55,"accn":"0001453687-18-000052","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-1.55,"accn":"0001453687-19-000104","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":-0.84,"accn":"0001453687-18-000052","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":-0.84,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15"},{"start":"2018-04-01","end":"2018-06-30","val":-0.84,"accn":"0001453687-19-000104","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":-0.84,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":-2.27,"accn":"0001453687-18-000080","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08"},{"start":"2018-01-01","end":"2018-09-30","val":-2.27,"accn":"0001453687-19-000157","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":-0.71,"accn":"0001453687-18-000080","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":-0.71,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15"},{"start":"2018-07-01","end":"2018-09-30","val":-0.71,"accn":"0001453687-19-000157","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":-0.71,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":-2.92,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15"},{"start":"2018-01-01","end":"2018-12-31","val":-2.92,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12"},{"start":"2018-01-01","end":"2018-12-31","val":-2.92,"accn":"0001453687-21-000031","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-12","frame":"CY2018"},{"start":"2018-10-01","end":"2018-12-31","val":-0.65,"accn":"0001453687-19-000032","fy":2018,"fp":"Q4","form":"10-K","filed":"2019-03-15"},{"start":"2018-10-01","end":"2018-12-31","val":-0.65,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12","frame":"CY2018Q4"},{"start":"2019-01-01","end":"2019-03-31","val":-0.31,"accn":"0001453687-19-000053","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-0.31,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12"},{"start":"2019-01-01","end":"2019-03-31","val":-0.31,"accn":"0001453687-20-000052","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-0.68,"accn":"0001453687-19-000104","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-08"},{"start":"2019-01-01","end":"2019-06-30","val":-0.68,"accn":"0001453687-20-000096","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-06"},{"start":"2019-04-01","end":"2019-06-30","val":-0.37,"accn":"0001453687-19-000104","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-08"},{"start":"2019-04-01","end":"2019-06-30","val":-0.37,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12"},{"start":"2019-04-01","end":"2019-06-30","val":-0.37,"accn":"0001453687-20-000096","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-06","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":-0.94,"accn":"0001453687-19-000157","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-0.94,"accn":"0001453687-20-000129","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":-0.26,"accn":"0001453687-19-000157","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":-0.26,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12"},{"start":"2019-07-01","end":"2019-09-30","val":-0.26,"accn":"0001453687-20-000129","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":-1.22,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12"},{"start":"2019-01-01","end":"2019-12-31","val":-1.22,"accn":"0001453687-21-000031","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-12","frame":"CY2019"},{"start":"2019-10-01","end":"2019-12-31","val":-0.28,"accn":"0001453687-20-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-12","frame":"CY2019Q4"},{"start":"2020-01-01","end":"2020-03-31","val":-0.21,"accn":"0001453687-20-000052","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-0.21,"accn":"0001453687-21-000069","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-13","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-0.46,"accn":"0001453687-20-000096","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-06"},{"start":"2020-04-01","end":"2020-06-30","val":-0.25,"accn":"0001453687-20-000096","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-06","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-0.54,"accn":"0001453687-20-000129","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":-0.09,"accn":"0001453687-20-000129","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-0.68,"accn":"0001453687-21-000031","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-12","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-0.22,"accn":"0001453687-21-000069","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-13","frame":"CY2021Q1"}]}}