CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ DEFICIT - USD ($) $ in Thousands	Total	Common Class A	Common stock Common Class A	Additional paid-in capital	Accumulated deficit
Beginning balance (in shares) at Dec. 31, 2023			591,712
Beginning balance at Dec. 31, 2023	$ 3,187		$ 0	$ 376,234	$ (373,047)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting of RSUs (in shares)			2,613
Share repurchase related to Section 16 Officer tax coverage exchange (in shares)			(425)
Share repurchase related to Section 16 Officer tax coverage exchange	(3)			(3)
Stock-based compensation - stock options, RSAs, RSUs	1,443			1,443
Issuance of common stock and related warrants in registered offering, net of issuance costs (in shares)			158,572
Issuance of common stock and related warrants in registered offering, net of issuance costs	7,171			7,171
Issuance of common stock upon exercise of pre-funded warrants (in shares)			435,092
Net loss	(8,313)				(8,313)
Ending balance (in shares) at Mar. 31, 2024			1,187,564
Ending balance at Mar. 31, 2024	3,485		$ 0	384,845	(381,360)
Beginning balance (in shares) at Dec. 31, 2024		2,780,597	2,780,597
Beginning balance at Dec. 31, 2024	(7,810)		$ 0	400,183	(407,993)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting of RSUs (in shares)			1,951
Share repurchase related to Section 16 Officer tax coverage exchange (in shares)			(424)
Share repurchase related to Section 16 Officer tax coverage exchange	(1)			(1)
Stock-based compensation - stock options, RSAs, RSUs	1,057			1,057
Issuance of common stock and related warrants in registered offering, net of issuance costs (in shares)			300,000
Issuance of common stock and related warrants in registered offering, net of issuance costs	4,401			4,401
Issuance of common stock upon exercise of pre-funded warrants (in shares)			1,176,886
Issuance of common stock in connection with warrant inducement, net of issuance costs (in shares)			331,000
Issuance of common stock in connection with warrant inducement, net of issuance costs	1,889			1,889
Issuance of common stock for convertible note principal and interest (in shares)			190,000
Issuance of common stock for convertible note principal and interest	664			664
Net loss	(6,172)				(6,172)
Ending balance (in shares) at Mar. 31, 2025		4,780,010	4,780,010
Ending balance at Mar. 31, 2025	$ (5,972)		$ 0	$ 408,193	$ (414,165)