CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Equity Distribution Agreement	Tumim Purchase Agreement	Common Stock	Common Stock Equity Distribution Agreement	Common Stock Tumim Purchase Agreement	Additional Paid-in Capital	Additional Paid-in Capital Equity Distribution Agreement	Additional Paid-in Capital Tumim Purchase Agreement	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period (in shares) at Dec. 31, 2021				413,340,550
Balance at beginning of period at Dec. 31, 2021	$ 693,572			$ 41			$ 1,944,341			$ (1,250,612)	$ (198)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)				179,831
Exercise of stock options	308			$ 0			308
Issuance of shares for RSU awards (in shares)				1,180,047
Common stock issued (in shares)						3,643,644
Common stock issued			$ 27,376			$ 1			$ 27,375
Stock-based compensation	53,528						53,528
Net loss	(152,941)									(152,941)
Other comprehensive loss	329										329
Balance at end of period (in shares) at Mar. 31, 2022				418,344,072
Balance at end of period at Mar. 31, 2022	$ 622,172			$ 42			2,025,552			(1,403,553)	131
Balance at beginning of period (in shares) at Dec. 31, 2022	512,935,485			512,935,485
Balance at beginning of period at Dec. 31, 2022	$ 526,479			$ 51			2,562,855			(2,034,850)	(1,577)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	156,366			156,366
Exercise of stock options	$ 166			$ 0			166
Issuance of shares for RSU awards (in shares)				2,789,660
Common stock issued (in shares)					17,020,258	28,922,476
Common stock issued		$ 31,612	$ 64,713		$ 2	$ 3		$ 31,610	$ 64,710
Issuance of common stock upon conversion of 5% Senior Convertible Notes (in shares)				32,358,306
Issuance of common stock upon conversion of 5% Senior Convertible Notes	67,500			$ 3			67,497
Stock-based compensation	24,548						24,548
Net loss	(169,094)									(169,094)
Other comprehensive loss	$ (53)										(53)
Balance at end of period (in shares) at Mar. 31, 2023	594,182,551			594,182,551
Balance at end of period at Mar. 31, 2023	$ 545,871			$ 59			$ 2,751,386			$ (2,203,944)	$ (1,630)