{"cik":1180145,"taxonomy":"us-gaap","tag":"CommonStockValue","label":"Common Stock, Value, Issued","description":"Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.","entityName":"CARDIOVASCULAR SYSTEMS, INC.","units":{"USD":[{"end":"2011-06-30","val":17000,"accn":"0001193125-11-302164","fy":2012,"fp":"Q1","form":"10-Q","filed":"2011-11-08"},{"end":"2011-06-30","val":17000,"accn":"0001193125-12-048486","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-02-09"},{"end":"2011-06-30","val":17000,"accn":"0001193125-12-218802","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-05-08"},{"end":"2011-06-30","val":17000,"accn":"0001193125-12-386811","fy":2012,"fp":"FY","form":"10-K","filed":"2012-09-10","frame":"CY2011Q2I"},{"end":"2011-09-30","val":18000,"accn":"0001193125-11-302164","fy":2012,"fp":"Q1","form":"10-Q","filed":"2011-11-08","frame":"CY2011Q3I"},{"end":"2011-12-31","val":18000,"accn":"0001193125-12-048486","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-02-09","frame":"CY2011Q4I"},{"end":"2012-03-31","val":18000,"accn":"0001193125-12-218802","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-05-08","frame":"CY2012Q1I"},{"end":"2012-06-30","val":20000,"accn":"0001193125-12-386811","fy":2012,"fp":"FY","form":"10-K","filed":"2012-09-10"},{"end":"2012-06-30","val":20000,"accn":"0001193125-12-460524","fy":2013,"fp":"Q1","form":"10-Q","filed":"2012-11-08"},{"end":"2012-06-30","val":20000,"accn":"0001193125-13-046187","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-02-08"},{"end":"2012-06-30","val":20000,"accn":"0001193125-13-211270","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-05-09"},{"end":"2012-06-30","val":20000,"accn":"0001445305-13-002256","fy":2013,"fp":"FY","form":"10-K","filed":"2013-09-11","frame":"CY2012Q2I"},{"end":"2012-09-30","val":21000,"accn":"0001193125-12-460524","fy":2013,"fp":"Q1","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":21000,"accn":"0001193125-13-046187","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-02-08","frame":"CY2012Q4I"},{"end":"2013-03-31","val":24000,"accn":"0001193125-13-211270","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-05-09","frame":"CY2013Q1I"},{"end":"2013-06-30","val":24000,"accn":"0001445305-13-002256","fy":2013,"fp":"FY","form":"10-K","filed":"2013-09-11"},{"end":"2013-06-30","val":24000,"accn":"0001445305-13-002675","fy":2014,"fp":"Q1","form":"10-Q","filed":"2013-11-04"},{"end":"2013-06-30","val":24000,"accn":"0001445305-14-000275","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-02-07"},{"end":"2013-06-30","val":24000,"accn":"0001180145-14-000009","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-05-08"},{"end":"2013-06-30","val":24000,"accn":"0001180145-14-000030","fy":2014,"fp":"FY","form":"10-K","filed":"2014-08-28","frame":"CY2013Q2I"},{"end":"2013-09-30","val":25000,"accn":"0001445305-13-002675","fy":2014,"fp":"Q1","form":"10-Q","filed":"2013-11-04","frame":"CY2013Q3I"},{"end":"2013-12-31","val":30000,"accn":"0001445305-14-000275","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-02-07","frame":"CY2013Q4I"},{"end":"2014-03-31","val":31000,"accn":"0001180145-14-000009","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-05-08","frame":"CY2014Q1I"},{"end":"2014-06-30","val":31000,"accn":"0001180145-14-000030","fy":2014,"fp":"FY","form":"10-K","filed":"2014-08-28"},{"end":"2014-06-30","val":31000,"accn":"0001180145-14-000043","fy":2015,"fp":"Q1","form":"10-Q","filed":"2014-11-07"},{"end":"2014-06-30","val":31000,"accn":"0001180145-15-000004","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-02-06"},{"end":"2014-06-30","val":31000,"accn":"0001180145-15-000011","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-05-08"},{"end":"2014-06-30","val":31000,"accn":"0001180145-15-000026","fy":2015,"fp":"FY","form":"10-K","filed":"2015-08-27","frame":"CY2014Q2I"},{"end":"2014-09-30","val":31000,"accn":"0001180145-14-000043","fy":2015,"fp":"Q1","form":"10-Q","filed":"2014-11-07","frame":"CY2014Q3I"},{"end":"2014-12-31","val":32000,"accn":"0001180145-15-000004","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-02-06","frame":"CY2014Q4I"},{"end":"2015-03-31","val":32000,"accn":"0001180145-15-000011","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-05-08","frame":"CY2015Q1I"},{"end":"2015-06-30","val":32000,"accn":"0001180145-15-000026","fy":2015,"fp":"FY","form":"10-K","filed":"2015-08-27"},{"end":"2015-06-30","val":32000,"accn":"0001180145-15-000045","fy":2016,"fp":"Q1","form":"10-Q","filed":"2015-11-06"},{"end":"2015-06-30","val":32000,"accn":"0001180145-16-000058","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-02-02"},{"end":"2015-06-30","val":32000,"accn":"0001180145-16-000075","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-05-06"},{"end":"2015-06-30","val":32000,"accn":"0001180145-16-000096","fy":2016,"fp":"FY","form":"10-K","filed":"2016-08-25","frame":"CY2015Q2I"},{"end":"2015-09-30","val":32000,"accn":"0001180145-15-000045","fy":2016,"fp":"Q1","form":"10-Q","filed":"2015-11-06","frame":"CY2015Q3I"},{"end":"2015-12-31","val":33000,"accn":"0001180145-16-000058","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-02-02","frame":"CY2015Q4I"},{"end":"2016-03-31","val":33000,"accn":"0001180145-16-000075","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-05-06","frame":"CY2016Q1I"},{"end":"2016-06-30","val":33000,"accn":"0001180145-16-000096","fy":2016,"fp":"FY","form":"10-K","filed":"2016-08-25"},{"end":"2016-06-30","val":33000,"accn":"0001180145-16-000105","fy":2017,"fp":"Q1","form":"10-Q","filed":"2016-11-04"},{"end":"2016-06-30","val":33000,"accn":"0001180145-17-000009","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-02-03"},{"end":"2016-06-30","val":33000,"accn":"0001180145-17-000024","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-05-05"},{"end":"2016-06-30","val":33000,"accn":"0001180145-17-000040","fy":2017,"fp":"FY","form":"10-K","filed":"2017-08-24","frame":"CY2016Q2I"},{"end":"2016-09-30","val":33000,"accn":"0001180145-16-000105","fy":2017,"fp":"Q1","form":"10-Q","filed":"2016-11-04","frame":"CY2016Q3I"},{"end":"2016-12-31","val":33000,"accn":"0001180145-17-000009","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-02-03","frame":"CY2016Q4I"},{"end":"2017-03-31","val":33000,"accn":"0001180145-17-000024","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-05-05","frame":"CY2017Q1I"},{"end":"2017-06-30","val":33000,"accn":"0001180145-17-000040","fy":2017,"fp":"FY","form":"10-K","filed":"2017-08-24"},{"end":"2017-06-30","val":33000,"accn":"0001180145-17-000055","fy":2018,"fp":"Q1","form":"10-Q","filed":"2017-11-03"},{"end":"2017-06-30","val":33000,"accn":"0001180145-18-000012","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-02-09"},{"end":"2017-06-30","val":33000,"accn":"0001180145-18-000026","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-05-04"},{"end":"2017-06-30","val":33000,"accn":"0001180145-18-000044","fy":2018,"fp":"FY","form":"10-K","filed":"2018-08-23","frame":"CY2017Q2I"},{"end":"2017-09-30","val":33000,"accn":"0001180145-17-000055","fy":2018,"fp":"Q1","form":"10-Q","filed":"2017-11-03","frame":"CY2017Q3I"},{"end":"2017-12-31","val":33000,"accn":"0001180145-18-000012","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-02-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":33000,"accn":"0001180145-18-000026","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-05-04","frame":"CY2018Q1I"},{"end":"2018-06-30","val":33000,"accn":"0001180145-18-000044","fy":2018,"fp":"FY","form":"10-K","filed":"2018-08-23"},{"end":"2018-06-30","val":33000,"accn":"0001180145-19-000008","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-02-01"},{"end":"2018-06-30","val":33000,"accn":"0001180145-19-000015","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-05-03"},{"end":"2018-06-30","val":33000,"accn":"0001180145-19-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2019-08-23","frame":"CY2018Q2I"},{"end":"2018-09-30","val":33000,"accn":"0001180145-18-000054","fy":2019,"fp":"Q1","form":"10-Q","filed":"2018-11-02","frame":"CY2018Q3I"},{"end":"2018-12-31","val":34000,"accn":"0001180145-19-000008","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-02-01","frame":"CY2018Q4I"},{"end":"2019-03-31","val":34000,"accn":"0001180145-19-000015","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-05-03","frame":"CY2019Q1I"},{"end":"2019-06-30","val":34000,"accn":"0001180145-19-000028","fy":2019,"fp":"FY","form":"10-K","filed":"2019-08-23"},{"end":"2019-06-30","val":34000,"accn":"0001180145-19-000043","fy":2020,"fp":"Q1","form":"10-Q","filed":"2019-10-31"},{"end":"2019-06-30","val":34000,"accn":"0001180145-20-000008","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-02-06"},{"end":"2019-06-30","val":34000,"accn":"0001180145-20-000023","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-05-07"},{"end":"2019-06-30","val":34000,"accn":"0001180145-20-000042","fy":2020,"fp":"FY","form":"10-K","filed":"2020-08-20","frame":"CY2019Q2I"},{"end":"2019-09-30","val":34000,"accn":"0001180145-19-000043","fy":2020,"fp":"Q1","form":"10-Q","filed":"2019-10-31","frame":"CY2019Q3I"},{"end":"2019-12-31","val":34000,"accn":"0001180145-20-000008","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-02-06","frame":"CY2019Q4I"},{"end":"2020-03-31","val":34000,"accn":"0001180145-20-000023","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":39000,"accn":"0001180145-20-000042","fy":2020,"fp":"FY","form":"10-K","filed":"2020-08-20"},{"end":"2020-06-30","val":39000,"accn":"0001180145-20-000052","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2020-06-30","val":39000,"accn":"0001180145-21-000010","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-02-04"},{"end":"2020-06-30","val":39000,"accn":"0001180145-21-000020","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-05-06"},{"end":"2020-06-30","val":39000,"accn":"0001180145-21-000032","fy":2021,"fp":"FY","form":"10-K","filed":"2021-08-19","frame":"CY2020Q2I"},{"end":"2020-09-30","val":39000,"accn":"0001180145-20-000052","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":39000,"accn":"0001180145-21-000010","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-02-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":39000,"accn":"0001180145-21-000020","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":39000,"accn":"0001180145-21-000032","fy":2021,"fp":"FY","form":"10-K","filed":"2021-08-19"},{"end":"2021-06-30","val":39000,"accn":"0001180145-21-000046","fy":2022,"fp":"Q1","form":"10-Q","filed":"2021-11-09"},{"end":"2021-06-30","val":39000,"accn":"0001180145-22-000004","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-02-03"},{"end":"2021-06-30","val":39000,"accn":"0001180145-22-000019","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-05-05"},{"end":"2021-06-30","val":39000,"accn":"0001180145-22-000038","fy":2022,"fp":"FY","form":"10-K","filed":"2022-08-18","frame":"CY2021Q2I"},{"end":"2021-09-30","val":39000,"accn":"0001180145-21-000046","fy":2022,"fp":"Q1","form":"10-Q","filed":"2021-11-09","frame":"CY2021Q3I"},{"end":"2021-12-31","val":39000,"accn":"0001180145-22-000004","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-02-03","frame":"CY2021Q4I"},{"end":"2022-03-31","val":39000,"accn":"0001180145-22-000019","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":40000,"accn":"0001180145-22-000038","fy":2022,"fp":"FY","form":"10-K","filed":"2022-08-18"},{"end":"2022-06-30","val":40000,"accn":"0001180145-22-000052","fy":2023,"fp":"Q1","form":"10-Q","filed":"2022-11-03"},{"end":"2022-06-30","val":40000,"accn":"0001180145-23-000016","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-02-09","frame":"CY2022Q2I"},{"end":"2022-09-30","val":40000,"accn":"0001180145-22-000052","fy":2023,"fp":"Q1","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":40000,"accn":"0001180145-23-000016","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-02-09","frame":"CY2022Q4I"}]}}