CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Gain (Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2022		88,054,127
Beginning balance at Dec. 31, 2022	$ 256,857	$ 88	$ 970,535	$ (337)	$ (713,429)
Increase (Decrease) in Stockholders' Equity
Share-based compensation	4,363		4,363
Employee stock purchase plan purchases (in shares)		308,000
Employee stock purchase plan purchases	357	$ 1	356
RSU stock issuance (in shares)		221,440
Comprehensive loss:
Unrealized (loss) gain on debt investments, net	106			106
Net loss	(21,372)				(21,372)
Comprehensive loss	(21,266)
Ending balance (in shares) at Mar. 31, 2023		88,583,567
Ending balance at Mar. 31, 2023	$ 240,311	$ 89	975,254	(231)	(734,801)
Beginning balance (in shares) at Dec. 31, 2023	88,929,300	88,929,300
Beginning balance at Dec. 31, 2023	$ 193,029	$ 89	988,457	7	(795,524)
Increase (Decrease) in Stockholders' Equity
Share-based compensation	2,749		2,749
Employee stock purchase plan purchases (in shares)		419,546
Employee stock purchase plan purchases	378	$ 1	377
RSU stock issuance (in shares)		281,056
Comprehensive loss:
Unrealized (loss) gain on debt investments, net	(185)			(185)
Net loss	(21,869)				(21,869)
Comprehensive loss	$ (22,054)
Ending balance (in shares) at Mar. 31, 2024	89,629,902	89,629,902
Ending balance at Mar. 31, 2024	$ 174,102	$ 90	$ 991,583	$ (178)	$ (817,393)