Net Loss Per Share - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net loss	$ (895)	$ (1,049)	$ (1,219)	$ (7,152)	$ (9,033)	$ (4,539)	$ (3,163)	$ (20,724)
Less: deemed dividend	(133)			0			(282)	0
Less: induced conversion on warrants	0			0			(751)	0
Less: warrant modification	0			0			(25)	0
Net loss attributable to common stockholders	$ (1,028)			$ (7,152)			$ (4,221)	$ (20,724)
Denominator:
Weighted-average number of shares of common stock - basic (in shares)	3,463			2,065			2,676	2,065
Weighted-average number of shares of common stock - diluted (in shares)	3,463			2,065			2,676	2,065
Basic net loss per share (in dollars per share)	$ (0.30)			$ (3.46)			$ (1.58)	$ (10.04)
Diluted net loss per share (in dollars per share)	$ (0.30)			$ (3.46)			$ (1.58)	$ (10.04)