Consolidated Statements of Changes in Stockholders' Deficit and Non-Controlling Interests - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit	Deficit Attributable to Stockholders
Beginning balance (in shares) at Dec. 31, 2020		67,391	451
Beginning balance at Dec. 31, 2020		$ 68	$ (2,388)	$ 5,769	$ (102,013)	$ (98,564)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-classified stock-based compensation				558		558
Vesting of stock-based compensation (in shares)		159
Liability-classified stock-based compensation converted to equity-classified				313		313
Exercise of stock options (in shares)		90
Exercise of stock options				617		617
Net loss	$ (2,679)				(2,679)	(2,679)
Ending balance (in shares) at Mar. 31, 2021		67,640	451
Ending balance at Mar. 31, 2021		$ 68	$ (2,388)	7,257	(104,692)	(99,755)
Beginning balance (in shares) at Dec. 31, 2021		76,740	720
Beginning balance at Dec. 31, 2021	(64,237)	$ 77	$ (4,091)	39,835	(100,058)	(64,237)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-classified stock-based compensation				1,558		1,558
Vesting of stock-based compensation (in shares)		129
Stock repurchases (in shares)		27	27
Share repurchases and shares withheld for taxes		$ 1	$ (157)	(1)		(157)
Dividends on redeemable senior preferred stock				(7,595)		(7,595)
Accretion of redeemable senior preferred stock				(805)		(805)
Net loss	(333)				(333)	(333)
Ending balance (in shares) at Mar. 31, 2022		76,842	747
Ending balance at Mar. 31, 2022	$ (71,569)	$ 78	$ (4,248)	$ 32,992	$ (100,391)	$ (71,569)