CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock Series B Convertible Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income
Beginning Balances at Dec. 31, 2021	$ 74,512	$ 5	$ 24	$ 492,657	$ (11,134)	$ (408,989)	$ 1,949
Beginning Balances (in shares) at Dec. 31, 2021		5,000,000	22,230,000
Net income (loss)	(999)					(999)
Unrealized income (loss) from foreign currency translation adjustments	$ (175)						(175)
Issuance of common stock in connection with vesting of stock awards (shares)	88,000
Stock-based compensation	$ 895			895
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(399)				(399)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)			(18,000)
Ending Balances at Mar. 31, 2022	73,834	$ 5	$ 24	493,552	(11,533)	(409,988)	1,774
Ending Balances (in shares) at Mar. 31, 2022		5,000,000	22,300,000
Beginning Balances at Dec. 31, 2022	75,394	$ 5	$ 24	495,818	(12,173)	(409,381)	1,101
Beginning Balances (in shares) at Dec. 31, 2022		5,000,000	22,623,000
Net income (loss)	(2,719)					(2,719)
Unrealized income (loss) from foreign currency translation adjustments	120						120
Issuance of common stock in connection with vesting of stock awards (shares)			78,000
Stock-based compensation	990			990
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(184)				184
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)			(24,000)
Ending Balances at Mar. 31, 2023	$ 73,601	$ 5	$ 24	$ 496,808	$ (12,357)	$ (412,100)	$ 1,221
Ending Balances (in shares) at Mar. 31, 2023		5,000,000	22,677,000