Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2021		7,700,349
Beginning balance at Dec. 31, 2021	$ (161,992)	$ 12	$ 891,105	$ (1,052,897)	$ (212)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation cost	1,417		1,417
Other comprehensive income (loss)	(96)				(96)
Shares issued in connection with employee stock plans, net of shares withheld for employee taxes (in shares)		3,000
Shares issued in connection with employee stock plans, net of shares withheld for employee taxes	24		24
Purchase of non-controlling interest	0
Net income (loss)	(15,950)			(15,950)
Ending balance (in shares) at Mar. 31, 2022		7,703,349
Ending balance at Mar. 31, 2022	$ (176,597)	$ 12	892,546	(1,068,847)	(308)
Beginning balance (in shares) at Dec. 31, 2022	7,703,306	7,703,306
Beginning balance at Dec. 31, 2022	$ (225,393)	$ 12	895,897	(1,120,676)	(626)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation cost	908		908
Share repurchase (in shares)		(2)
Other comprehensive income (loss)	81				81
Net income (loss)	$ (12,241)			(12,241)
Ending balance (in shares) at Mar. 31, 2023	7,703,304	7,703,304
Ending balance at Mar. 31, 2023	$ (236,645)	$ 12	$ 896,805	$ (1,132,917)	$ (545)