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
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Loss from continuing operations, net of tax	$ (3,701)	$ (588)
Income from discontinued operations, net of tax	0	6,020
Net (loss) income	(3,701)	5,432
Deemed dividend on Series A perpetual preferred stock	(479)	(479)
Net (loss) income attributable to common shareholders	$ (4,180)	$ 4,953
Denominator:
Weighted average number of shares outstanding (in shares)	12,434	4,916
Weighted average prefunded warrants outstanding (in shares)	235	0
Weighted-average shares outstanding - basic (in shares)	12,669	4,916
Weighted average share outstanding - diluted (in shares)	12,669	4,916
Net (loss) income per share - basic and diluted
Net loss per share, continuing operations, basic (usd per share)	$ (0.29)	$ (0.12)
Net loss per share, continuing operations, diluted (usd per share)	(0.29)	(0.12)
Net income per share, discontinued operations, basic (usd per share)	0	1.22
Net income per share, discontinued operations, diluted (usd per share)	0	1.22
Net (loss) income per share - basic (usd per share)	(0.29)	1.10
Net (loss) income per share - diluted (usd per share)	(0.29)	1.10
Deemed dividend on Series A redeemable preferred stock per share (in usd per share)	(0.04)	(0.10)
Net (loss) income per share, attributable to common shareholders— basic (usd per share)	(0.33)	1.01
Net (loss) income per share, attributable to common shareholders— diluted (usd per share)	$ (0.33)	$ 1.01