CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) in Stockholders' Equity
Total stockholders' deficit	$ (121,498)	$ (101,931)	$ (94,433)	$ (91,321)	$ (84,369)	$ (77,963)	$ (82,535)	$ (76,500)	$ (143,739)	$ (199,936)	[1]
Accumulated Deficit
Increase (Decrease) in Stockholders' Equity
Total stockholders' deficit	(827,380)	(808,436)	(798,567)	(795,236)	(786,094)	(775,914)	(776,027)	(768,604)	(767,726)	(806,081)	[1]
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity
Total stockholders' deficit	$ 707,116	$ 706,133	$ 705,230	704,309	702,370	699,536	696,567	693,896	624,805	606,431	[1]
Adjustments
Increase (Decrease) in Stockholders' Equity
Total stockholders' deficit				$ 2,759	2,519	$ (910)	$ (3,193)	$ (7,713)	(17,056)	(87,691)
Adjustments | Accumulated Deficit
Increase (Decrease) in Stockholders' Equity
Total stockholders' deficit					22,752				3,177	(67,458)
Adjustments | Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity
Total stockholders' deficit					$ (20,233)				$ (20,233)	$ (20,233)

[1] The March 31, 2021 ending total shareholders’ deficit reflects the impact of the restatement totaling $87.7 million related to SSP and warrant classification adjustments prior to that time, including a $67.5 million increase of Accumulated deficit and a $20.2 million decrease of Additional paid-in -capital.