CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ 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, 2022	$ 75,394	$ 5	$ 24	$ 495,818	$ (12,173)	$ (409,381)	$ 1,101
Beginning Balances (in shares) at Dec. 31, 2022		5,000	22,623
Net 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
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)
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	22,677
Beginning Balances at Dec. 31, 2023	74,272	$ 5	$ 25	500,752	(12,969)	(414,870)	1,329
Beginning Balances (in shares) at Dec. 31, 2023		5,000	23,247
Net loss	(4,558)					(4,558)
Unrealized income (loss) from foreign currency translation adjustments	(290)						(290)
Issuance of common stock in connection with vesting of stock awards (shares)			120
Stock-based compensation	1,019			1,019
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(277)				(277)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)			(33)
Ending Balances at Mar. 31, 2024	$ 70,166	$ 5	$ 25	$ 501,771	$ (13,246)	$ (419,428)	$ 1,039
Ending Balances (in shares) at Mar. 31, 2024		5,000	23,334