CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2022	$ 218,139	$ 5	$ 579,456	$ (912)	$ (360,410)
Beginning balance, shares at Dec. 31, 2022		46,707,084
Restricted stock units vested, shares		67,406
Stock-based compensation	3,695		3,695
Foreign currency translation adjustment	28			28
Unrealized gain (loss) on available-for-sale debt securities	429			429
Net loss	(28,659)				(28,659)
Ending balance at Mar. 31, 2023	193,632	$ 5	583,151	(455)	(389,069)
Ending balance, shares at Mar. 31, 2023		46,774,490
Beginning balance at Dec. 31, 2023	129,441	$ 5	598,364	(222)	(468,706)
Beginning balance, shares at Dec. 31, 2023		50,480,694
Proceeds from sales of common stock under ATM facility, net of commissions	1,437		1,437
Proceeds from sales of common stock under ATM facility, net of commissions, shares		880,000
Restricted stock units vested, shares		33,505
Stock-based compensation	2,687		2,687
Foreign currency translation adjustment	170			170
Unrealized gain (loss) on available-for-sale debt securities	(73)			(73)
Net loss	(12,968)				(12,968)
Ending balance at Mar. 31, 2024	$ 120,694	$ 5	$ 602,488	$ (125)	$ (481,674)
Ending balance, shares at Mar. 31, 2024		51,394,199