Condensed Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Preferred Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Gain (Loss)	Treasury Stock
Common stock beginning balance (in shares) at Dec. 31, 2022		189,214,000
Beginning balance at Dec. 31, 2022	$ 117,124	$ 189	$ 0	$ 1,709,144	$ (1,589,720)	$ (428)	$ (2,061)
Preferred stock beginning balance (in shares) at Dec. 31, 2022			0
Stock-based compensation	3,415			3,415
Issuance of common stock under Equity Incentive Plans (in shares)		1,216,000
Proceeds from issuance of common stock for equity incentive plans	0	$ 1		(1)
Repurchase of common stock	(824)						(824)
Net loss	(31,934)				(31,934)
Unrealized gain (loss) on investments	265					265
Common stock ending balance (in shares) at Mar. 31, 2023		190,430,000
Ending balance at Mar. 31, 2023	88,046	$ 190	$ 0	1,712,558	(1,621,654)	(163)	(2,885)
Preferred stock ending balance (in shares) at Mar. 31, 2023			0
Common stock beginning balance (in shares) at Dec. 31, 2022		189,214,000
Beginning balance at Dec. 31, 2022	117,124	$ 189	$ 0	1,709,144	(1,589,720)	(428)	(2,061)
Preferred stock beginning balance (in shares) at Dec. 31, 2022			0
Issuance of equity-classified warrants	307
Net loss	(76,838)
Unrealized gain (loss) on investments	328
Common stock ending balance (in shares) at Jun. 30, 2023		245,793,000
Ending balance at Jun. 30, 2023	186,361	$ 245	$ 0	1,855,659	(1,666,558)	(100)	(2,885)
Preferred stock ending balance (in shares) at Jun. 30, 2023			0
Common stock beginning balance (in shares) at Mar. 31, 2023		190,430,000
Beginning balance at Mar. 31, 2023	88,046	$ 190	$ 0	1,712,558	(1,621,654)	(163)	(2,885)
Preferred stock beginning balance (in shares) at Mar. 31, 2023			0
Stock-based compensation	3,815			3,815
Issuance of equity-classified warrants	307			307
Stock Issued During Period, Shares, New Issues		55,288,000
Stock Issued During Period, Value, New Issues	$ 139,034	$ 55		138,979
Issuance of common stock under Equity Incentive Plans (in shares)	75,000
Proceeds from issuance of common stock for equity incentive plans	$ 0
Net loss	(44,904)				(44,904)
Unrealized gain (loss) on investments	63					63
Common stock ending balance (in shares) at Jun. 30, 2023		245,793,000
Ending balance at Jun. 30, 2023	$ 186,361	$ 245	$ 0	1,855,659	(1,666,558)	(100)	(2,885)
Preferred stock ending balance (in shares) at Jun. 30, 2023			0
Common stock beginning balance (in shares) at Dec. 31, 2023	245,792,668	245,793,000
Beginning balance at Dec. 31, 2023	$ 93,110	$ 245	$ 0	1,862,558	(1,766,839)	31	(2,885)
Preferred stock beginning balance (in shares) at Dec. 31, 2023	0		0
Stock-based compensation	$ 4,302			4,302
Stock Issued During Period, Shares, New Issues			2,304,000
Stock Issued During Period, Value, New Issues	241,575		$ 23	241,552
Issuance of common stock under Equity Incentive Plans (in shares)		1,972,000
Proceeds from issuance of common stock for equity incentive plans	88	$ 3		85
Repurchase of common stock	(1,730)						(1,730)
Net loss	(48,397)				(48,397)
Unrealized gain (loss) on investments	(81)					(81)
Common stock ending balance (in shares) at Mar. 31, 2024		247,765,000
Ending balance at Mar. 31, 2024	$ 288,867	$ 248	$ 23	2,108,497	(1,815,236)	(50)	(4,615)
Preferred stock ending balance (in shares) at Mar. 31, 2024			2,304,000
Common stock beginning balance (in shares) at Dec. 31, 2023	245,792,668	245,793,000
Beginning balance at Dec. 31, 2023	$ 93,110	$ 245	$ 0	1,862,558	(1,766,839)	31	(2,885)
Preferred stock beginning balance (in shares) at Dec. 31, 2023	0		0
Issuance of equity-classified warrants	$ 0
Net loss	(101,826)
Unrealized gain (loss) on investments	$ (224)
Common stock ending balance (in shares) at Jun. 30, 2024	363,020,303	363,020,000
Ending balance at Jun. 30, 2024	$ 239,980	$ 363	$ 0	2,113,090	(1,868,665)	(193)	(4,615)
Preferred stock ending balance (in shares) at Jun. 30, 2024	2,304,147		0
Common stock beginning balance (in shares) at Mar. 31, 2024		247,765,000
Beginning balance at Mar. 31, 2024	$ 288,867	$ 248	$ 23	2,108,497	(1,815,236)	(50)	(4,615)
Preferred stock beginning balance (in shares) at Mar. 31, 2024			2,304,000
Stock-based compensation	4,859			4,859
Stock Issued During Period, Value, New Issues	(175)			(175)
Conversion of preferred stock to common stock (in shares)		115,207,000	(2,304,000)
Conversion of preferred stock to common stock	0	$ 115	$ (23)	(92)
Issuance of common stock under Equity Incentive Plans (in shares)		48,000
Proceeds from issuance of common stock for equity incentive plans	1			1
Net loss	(53,429)				(53,429)
Unrealized gain (loss) on investments	$ (143)					(143)
Common stock ending balance (in shares) at Jun. 30, 2024	363,020,303	363,020,000
Ending balance at Jun. 30, 2024	$ 239,980	$ 363	$ 0	$ 2,113,090	$ (1,868,665)	$ (193)	$ (4,615)
Preferred stock ending balance (in shares) at Jun. 30, 2024	2,304,147		0