STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Beginning Balance (in shares) at Dec. 31, 2021		50,864
Beginning Balance at Dec. 31, 2021	$ 10,035	$ 0	$ 122,543	$ (112,508)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	707		707
Net proceeds received for issuance of common stock and prefunding of warrants (in shares)		5,631
Net proceeds received for issuance of common stock and prefunding of warrants	4,228		4,228
Issuance of common stock upon exercise of warrants, net (in shares)		10,916
Issuance of common stock for services (in shares)		57
Issuance of common stock for services	$ 4		4
Issuance of common stock for fractional shares in the reverse stock split (in shares)	4
Net loss	$ (9,695)			(9,695)
Ending Balance (in shares) at Dec. 31, 2022	67,472	67,472
Ending Balance at Dec. 31, 2022	$ 5,279	$ 0	127,482	(122,203)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	455		455
Net proceeds received for issuance of common stock and prefunding of warrants (in shares)		521,735
Net proceeds received for issuance of common stock and prefunding of warrants	5,407		5,407
Issuance of common stock upon exercise of warrants, net (in shares)		4,544,437
Issuance of common stock upon exercise of warrants, net	2,831	$ 5	2,826
Issuance of common stock for services (in shares)		4,539
Issuance of common stock for services	100		100
Issuance of shares pursuant to the vesting of restricted stock units, net of shares withheld for taxes (in shares)		1,102
Issuance of shares pursuant to the vesting of restricted stock units, net of shares withheld for taxes	(11)		(11)
Issuance of common stock for fractional shares in the reverse stock split (in shares)		739
Net loss	$ (7,710)			(7,710)
Ending Balance (in shares) at Dec. 31, 2023	5,140,024	5,140,024
Ending Balance at Dec. 31, 2023	$ 6,351	$ 5	$ 136,259	$ (129,913)