CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock	Comprehensive Income (Loss)
Balance at Dec. 31, 2018	$ 346,208	$ 154	$ 1,134,227	$ (610,482)	$ (177,691)
Balance (in shares) at Dec. 31, 2018		15,428,000			2,618,000
Increase (Decrease) in Stockholders' Equity
Net (loss) income and comprehensive (loss) income	(512)			(512)		$ (512)
Non-cash compensation	14,053		14,053
Purchase of treasury stock	$ (3,976)				$ (3,976)
Purchase of treasury stock (in shares)	17,501				18,000
Issuance of common stock for stock options, restricted stock awards and restricted stock units, net of withholding taxes	$ (3,585)	$ 1	(3,586)
Issuance of common stock for stock options, restricted stock awards and restricted stock units, net of withholding taxes (in shares)		87,000
Balance at Mar. 31, 2019	352,188	$ 155	1,144,694	(610,994)	$ (181,667)
Balance (in shares) at Mar. 31, 2019		15,515,000			2,636,000
Balance at Dec. 31, 2019	402,326	$ 157	1,177,984	(592,654)	$ (183,161)
Balance (in shares) at Dec. 31, 2019		15,677,000			2,641,000
Increase (Decrease) in Stockholders' Equity
Net (loss) income and comprehensive (loss) income	14,401			14,401		$ 14,401
Non-cash compensation	11,917		11,917
Issuance of common stock for stock options, restricted stock awards and restricted stock units, net of withholding taxes	(5,087)		(5,087)
Stockholders' Equity, Other	0		(1)	1
Issuance of common stock for stock options, restricted stock awards and restricted stock units, net of withholding taxes (in shares)		27,000
Balance at Mar. 31, 2020	$ 423,557	$ 157	$ 1,184,813	$ (578,252)	$ (183,161)
Balance (in shares) at Mar. 31, 2020		15,704,000			2,641,000