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	(3,863)					(3,863)
Unrealized income (loss) from foreign currency translation adjustments	101						101
Issuance of common stock in connection with vesting of stock awards (shares)			254
Stock-based compensation	1,984			1,984
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(284)				(284)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)			(40)
Proceeds from exercise of warrants	963			963
Proceeds from exercise of warrants, (shares)			275
Ending Balances at Jun. 30, 2023	74,295	$ 5	$ 24	498,765	(12,457)	(413,244)	1,202
Ending Balances (in shares) at Jun. 30, 2023		5,000	23,112
Beginning Balances at Mar. 31, 2023	73,601	$ 5	$ 24	496,808	(12,357)	(412,100)	1,221
Beginning Balances (in shares) at Mar. 31, 2023		5,000	22,677
Net loss	(1,144)					(1,144)
Unrealized income (loss) from foreign currency translation adjustments	(19)						(19)
Issuance of common stock in connection with vesting of stock awards (shares)			176
Stock-based compensation	994			994
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(100)				(100)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)			(16)
Proceeds from exercise of warrants	963			963
Proceeds from exercise of warrants, (shares)			275
Ending Balances at Jun. 30, 2023	74,295	$ 5	$ 24	498,765	(12,457)	(413,244)	1,202
Ending Balances (in shares) at Jun. 30, 2023		5,000	23,112
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	(10,774)					(10,774)
Unrealized income (loss) from foreign currency translation adjustments	(394)						(394)
Issuance of common stock in connection with vesting of stock awards (shares)			288
Stock-based compensation	2,494			2,494
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(541)				(541)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)			(87)
Ending Balances at Jun. 30, 2024	65,057	$ 5	$ 25	503,246	(13,510)	(425,644)	935
Ending Balances (in shares) at Jun. 30, 2024		5,000	23,448
Beginning Balances at Mar. 31, 2024	70,166	$ 5	$ 25	501,771	(13,246)	(419,428)	1,039
Beginning Balances (in shares) at Mar. 31, 2024		5,000	23,334
Net loss	(6,216)					(6,216)
Unrealized income (loss) from foreign currency translation adjustments	(104)						(104)
Issuance of common stock in connection with vesting of stock awards (shares)			168
Stock-based compensation	1,475			1,475
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(264)				(264)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)			(54)
Ending Balances at Jun. 30, 2024	$ 65,057	$ 5	$ 25	$ 503,246	$ (13,510)	$ (425,644)	$ 935
Ending Balances (in shares) at Jun. 30, 2024		5,000	23,448