CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock
Beginning balance at Dec. 31, 2022	$ 207,940	$ 162	$ 1,189,255	$ (715,299)	$ (266,178)
Beginning balance, common (in shares) at Dec. 31, 2022		16,167,000
Beginning balance, treasury (in shares) at Dec. 31, 2022					3,355,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	13,457			13,457
Comprehensive income (loss)	13,457			13,457
Non-cash compensation	11,274		11,274
Issuance of common stock for stock options, employee stock purchase plan, restricted stock awards and restricted stock units, net of withholding taxes	(1,693)	$ 1	(1,694)
Issuance of common stock for stock options, employee stock purchase plan, restricted stock awards and restricted stock units, net of withholding taxes (in shares)		98,000
Other	1		1
Ending balance at Mar. 31, 2023	230,979	$ 163	1,198,836	(701,842)	$ (266,178)
Ending balance, common (in shares) at Mar. 31, 2023		16,265,000
Ending balance, treasury (in shares) at Mar. 31, 2023					3,355,000
Beginning balance at Dec. 31, 2022	207,940	$ 162	1,189,255	(715,299)	$ (266,178)
Beginning balance, common (in shares) at Dec. 31, 2022		16,167,000
Beginning balance, treasury (in shares) at Dec. 31, 2022					3,355,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	13,342
Comprehensive income (loss)	13,342
Ending balance at Jun. 30, 2023	241,715	$ 163	1,209,687	(701,957)	$ (266,178)
Ending balance, common (in shares) at Jun. 30, 2023		16,324,000
Ending balance, treasury (in shares) at Jun. 30, 2023					3,355,000
Beginning balance at Mar. 31, 2023	230,979	$ 163	1,198,836	(701,842)	$ (266,178)
Beginning balance, common (in shares) at Mar. 31, 2023		16,265,000
Beginning balance, treasury (in shares) at Mar. 31, 2023					3,355,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(115)			(115)
Comprehensive income (loss)	(115)			(115)
Non-cash compensation	10,199		10,199
Issuance of common stock for stock options, employee stock purchase plan, restricted stock awards and restricted stock units, net of withholding taxes	652		652
Issuance of common stock for stock options, employee stock purchase plan, restricted stock awards and restricted stock units, net of withholding taxes (in shares)		59,000
Ending balance at Jun. 30, 2023	241,715	$ 163	1,209,687	(701,957)	$ (266,178)
Ending balance, common (in shares) at Jun. 30, 2023		16,324,000
Ending balance, treasury (in shares) at Jun. 30, 2023					3,355,000
Beginning balance at Dec. 31, 2023	$ 124,132	$ 164	1,227,849	(837,703)	$ (266,178)
Beginning balance, common (in shares) at Dec. 31, 2023	13,041,445	16,397,000
Beginning balance, treasury (in shares) at Dec. 31, 2023	3,355,466				3,355,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	$ 1,016			1,016
Comprehensive income (loss)	1,016			1,016
Non-cash compensation	7,789		7,789
Issuance of common stock for stock options, employee stock purchase plan, restricted stock awards and restricted stock units, net of withholding taxes	(1,422)	$ 2	(1,424)
Issuance of common stock for stock options, employee stock purchase plan, restricted stock awards and restricted stock units, net of withholding taxes (in shares)		180,000
Ending balance at Mar. 31, 2024	131,515	$ 166	1,234,214	(836,687)	$ (266,178)
Ending balance, common (in shares) at Mar. 31, 2024		16,577,000
Ending balance, treasury (in shares) at Mar. 31, 2024					3,355,000
Beginning balance at Dec. 31, 2023	$ 124,132	$ 164	1,227,849	(837,703)	$ (266,178)
Beginning balance, common (in shares) at Dec. 31, 2023	13,041,445	16,397,000
Beginning balance, treasury (in shares) at Dec. 31, 2023	3,355,466				3,355,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	$ 8,768
Comprehensive income (loss)	8,768
Ending balance at Jun. 30, 2024	$ 145,820	$ 167	1,240,766	(828,935)	$ (266,178)
Ending balance, common (in shares) at Jun. 30, 2024	13,339,928	16,695,000
Ending balance, treasury (in shares) at Jun. 30, 2024	3,355,466				3,355,000
Beginning balance at Mar. 31, 2024	$ 131,515	$ 166	1,234,214	(836,687)	$ (266,178)
Beginning balance, common (in shares) at Mar. 31, 2024		16,577,000
Beginning balance, treasury (in shares) at Mar. 31, 2024					3,355,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	7,752			7,752
Comprehensive income (loss)	7,752			7,752
Non-cash compensation	7,437		7,437
Issuance of common stock for stock options, employee stock purchase plan, restricted stock awards and restricted stock units, net of withholding taxes	(884)	$ 1	(885)
Issuance of common stock for stock options, employee stock purchase plan, restricted stock awards and restricted stock units, net of withholding taxes (in shares)		118,000
Ending balance at Jun. 30, 2024	$ 145,820	$ 167	$ 1,240,766	$ (828,935)	$ (266,178)
Ending balance, common (in shares) at Jun. 30, 2024	13,339,928	16,695,000
Ending balance, treasury (in shares) at Jun. 30, 2024	3,355,466				3,355,000