Basic and Diluted Net Income (Loss) Per Share - Reconciliation of Shares Used to Compute Basic and Diluted Net Income (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:
Income (loss) from continuing operations, net of tax		$ (2,365)			$ (986)			$ (3,715)	$ (6,707)
Income (loss) from discontinued operations, net of tax (Note 10)		(257)			(898)			27,119	(454)
Net income (loss)		(2,622)	$ 25,591	$ 435	(1,884)	$ (1,576)	$ (3,701)	23,404	(7,161)
Deemed dividend on Series A perpetual preferred stock		(479)			(479)			(1,437)	(1,437)
Net income (loss) attributable to common shareholders		(3,101)			(2,363)			21,967	(8,598)
Net income (loss) attributable to common shareholders		$ (3,101)			$ (2,363)			$ 21,967	$ (8,598)
Denominator:
Weighted average common shares outstanding (in shares)		15,642			15,109			15,344	14,208
Weighted average prefunded warrants outstanding (in shares)		39			325			229	295
Weighted average shares outstanding - basic (in shares)	[1]	15,681			15,434			15,573	14,503
Weighted-average shares outstanding - diluted (in shares)	[1]	15,819			15,434			15,743	14,503
Continuing operations
Basic (in usd per share)	[1]	$ (0.15)			$ (0.06)			$ (0.24)	$ (0.46)
Diluted (in usd per share)		(0.15)			(0.06)			(0.24)	(0.46)
Discontinued operations
Basic (in usd per share)	[1]	(0.02)			(0.06)			1.74	(0.03)
Diluted (in usd per share)		(0.02)			(0.06)			1.72	(0.03)
Net income (loss) per share
Basic (in usd per share)	[1]	(0.17)			(0.12)			1.50	(0.49)
Diluted (in usd per share)	[1]	(0.17)			(0.12)			1.49	(0.49)
Net income (loss) per share, attributable to common shareholders
Basic (in usd per share)	[1]	(0.20)			(0.15)			1.41	(0.59)
Diluted (in usd per share)	[1]	$ (0.20)			$ (0.15)			$ 1.40	$ (0.59)
Restricted stock units
Denominator:
Dilutive potential common shares (in shares)		138			0			170	0

[1] Earnings per share may not add due to rounding