Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Treasury	Retained Deficit
Beginning balance (in shares) at Dec. 31, 2018		26,990,000		242,000
Beginning balance at Dec. 31, 2018	$ 219,428	$ 270	$ 464,264	$ (3,835)	$ (241,271)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of restricted stock (in shares)		922,000		73,000
Issuances of restricted stock	(331)	$ 9	(9)	$ (331)
Amortization of stock-based compensation	8,714		8,714
Purchase of treasury stock	$ (4,790)		(375)	$ (4,415)
Purchase of treasury stock (in shares)	2,692,116			2,692,000
Net loss	$ (181,898)				(181,898)
Ending balance (in shares) at Dec. 31, 2019		27,912,000		3,007,000
Ending balance at Dec. 31, 2019	41,123	$ 279	472,594	$ (8,581)	(423,169)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of stock-based compensation	$ 1,532		1,532
Purchase of treasury stock (in shares)	4,553
Vesting of stock awards	$ (16)		(3,263)	$ 3,247
Vesting of stock awards (in shares)				5,000
Acquisition related capital contribution	22,904		22,904
Net loss	(268,175)				(268,175)
Ending balance (in shares) at Dec. 31, 2020		27,912,000		3,012,000
Ending balance at Dec. 31, 2020	$ (202,632)	$ 279	$ 493,767	$ (5,334)	$ (691,344)