Condensed Consolidated Statements of Stockholders' Deficit (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balance at Dec. 31, 2023	$ (33,973)	$ 1,503	$ 1,870,525	$ 13	$ (1,906,014)
Balance (in shares) at Dec. 31, 2023		150,285
Issuance of common stock under equity incentive plan	11	$ 1	10
Issuance of common stock under equity incentive plan (in shares)		93
Stock-based compensation expense	3,375		3,375
Net income (loss)	(3,160)				(3,160)
Net unrealized losses on short-term investments	(19)			(19)
Comprehensive income (loss)	(3,179)
Balance at Mar. 31, 2024	(33,766)	$ 1,504	1,873,910	(6)	(1,909,174)
Balance (in shares) at Mar. 31, 2024		150,378
Balance at Dec. 31, 2024	(33,651)	$ 1,521	1,884,409	13	(1,919,594)
Balance (in shares) at Dec. 31, 2024		152,128
Issuance of common stock under equity incentive plan	64	$ 3	61
Issuance of common stock under equity incentive plan (in shares)		299
Stock-based compensation expense	2,511		2,511
Net income (loss)	2,635				2,635
Net unrealized losses on short-term investments	(12)			(12)
Comprehensive income (loss)	2,623
Balance at Mar. 31, 2025	$ (28,453)	$ 1,524	$ 1,886,981	$ 1	$ (1,916,959)
Balance (in shares) at Mar. 31, 2025		152,427