Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings (Deficit)	Retained Earnings (Deficit) Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2020			30,874
Beginning balance at Dec. 31, 2020	$ 214,603		$ 9,257	$ 422,589		$ (189,565)		$ (27,678)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(34,291)					(34,291)
Foreign currency translation adjustment, net of tax	319							319
Non-cash compensation	2,330			2,330
Net settlement of vested stock awards (in shares)			19
Net settlement of vested stock awards	(101)		$ 6	(107)
Ending balance (in shares) at Mar. 31, 2021			30,893
Ending Balance at Mar. 31, 2021	182,860		$ 9,263	424,812		(223,856)		(27,359)
Beginning balance (in shares) at Dec. 31, 2020			30,874
Beginning balance at Dec. 31, 2020	$ 214,603		$ 9,257	422,589		(189,565)		(27,678)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	ASU 2020-06 (ASC 470-20)
Ending balance (in shares) at Dec. 31, 2021			31,215
Ending Balance at Dec. 31, 2021	$ 51,867	$ (1,827)	$ 9,359	444,824	$ (5,651)	(375,584)	$ 3,824	(26,732)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)			11,905
Issuance of common stock	9,768		$ 3,572	6,196
Net loss	(32,462)					(32,462)
Foreign currency translation adjustment, net of tax	346							346
Non-cash compensation (in shares)			2
Non-cash compensation	(624)			(624)
Net settlement of vested stock awards	2			2
Ending balance (in shares) at Mar. 31, 2022			43,122
Ending Balance at Mar. 31, 2022	$ 27,070		$ 12,931	$ 444,747		$ (404,222)		$ (26,386)