Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock, Common [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2021	235,219,000	0
Balance at Dec. 31, 2021	$ 235	$ 0	$ 954,649	$ (785,374)	$ (264)	$ 169,246
Stock-based compensation	$ 0		2,245	0	0	2,245
Exercise of stock options (in shares)	30,000	0
Exercise of stock options	$ 0	$ 0	12	0	0	12
Award of restricted stock units (in shares)	1,166,000	0
Award of restricted stock units	$ 1	$ 0	0	0	0	1
Return of common stock to pay withholding taxes on restricted stock (in shares)	0	436,000
Return of common stock to pay withholding taxes on restricted stock	$ 0	$ 0	(349)	0	0	(349)
Cancellation of treasury stock (in shares)	0	(436,000)
Cancellation of treasury stock	$ 0	$ 0	0	0	0	0
Other comprehensive loss	0			0	(1,202)	(1,202)
Net loss	$ 0			(19,128)	0	(19,128)
Balance (in shares) at Mar. 31, 2022	236,415,000	0
Balance at Mar. 31, 2022	$ 236	$ 0	956,557	(804,502)	(1,466)	150,825
Balance (in shares) at Dec. 31, 2022	236,895,000	0
Balance at Dec. 31, 2022	$ 237	$ 0	962,731	(860,935)	(2,388)	99,645
Stock-based compensation	$ 0		1,916	0	0	$ 1,916
Exercise of stock options (in shares)	13,000	0				13,300
Exercise of stock options	$ 0	$ 0	5	0	0	$ 5
Award of restricted stock units (in shares)	2,434,000
Award of restricted stock units	$ 2					2
Return of common stock to pay withholding taxes on restricted stock (in shares)	0	649,000
Return of common stock to pay withholding taxes on restricted stock	$ 0	$ 1	(490)	0	0	(489)
Cancellation of treasury stock (in shares)	0	(649,000)
Cancellation of treasury stock	$ 0	$ (1)	0	0	0	(1)
Other comprehensive loss	0	0	0	0	857	857
Net loss	$ 0	$ 0		(22,218)	0	(22,218)
Balance (in shares) at Mar. 31, 2023	239,342,000	0
Balance at Mar. 31, 2023	$ 239	$ 0	$ 964,162	$ (883,153)	$ (1,531)	$ 79,717