Condensed Consolidated Statements of Shareholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Deficit
Beginning Balance (in shares) at Dec. 31, 2020		2,084
Beginning Balance at Dec. 31, 2020	$ (279,265)	$ 21	$ 188,978	$ (468,264)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards (cancellations), net (in shares)		98
Restricted stock awards (cancellations), net		$ 1	(1)
Series A convertible preferred stock dividends	0
Stock-based compensation	166		166
Net income (loss)	38,844			38,844
Ending Balance (in shares) at Mar. 31, 2021		2,182
Ending Balance at Mar. 31, 2021	(240,255)	$ 22	189,143	(429,420)
Beginning Balance (in shares) at Dec. 31, 2021		6,634
Beginning Balance at Dec. 31, 2021	(46,810)	$ 66	295,781	(342,657)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Series A convertible preferred stock dividends	(1,133)		(1,133)
Stock-based compensation (in shares)		31
Stock-based compensation	1,828	$ 1	1,827
Net income (loss)	(16,678)			(16,678)
Ending Balance (in shares) at Mar. 31, 2022		6,665
Ending Balance at Mar. 31, 2022	$ (62,793)	$ 67	$ 296,475	$ (359,335)