Consolidated Statements of Changes in Stockholders Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Warrants	Additional Paid-In Capital	Accumulated Deficit
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of ASU 2016-02	$ 402,452	$ 36	$ 88,520	$ 1,059,253	$ (745,357)
Beginning Balance (in shares) at Dec. 31, 2019		35,772	6,659
Beginning Balance at Dec. 31, 2019	402,452	$ 36	$ 88,520	1,059,253	(745,357)
Increase (Decrease) in Stockholders' Equity
Issuance of stock awards, net of cancellations (in shares)		96
Issuance of stock awards, net of cancellations	0
Common stock issued for general unsecured claims (in shares)		60
Stock Issued During Period, Value, New Issues	0
Stock-based compensation	3,031			3,031
Issuance of warrants for general unsecured claims (in shares)			75
Issuance of warrants for general unsecured claims	0
Tax withholdings paid in exchange for shares withheld on employee vested stock awards	(64)			(64)
Net Income (loss)	(277,353)				(277,353)
Ending Balance (in shares) at Dec. 31, 2020		35,928	6,734
Ending Balance at Dec. 31, 2020	128,066	$ 36	$ 88,520	1,062,220	(1,022,710)
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of ASU 2016-02	128,066	$ 36	$ 88,520	1,062,220	(1,022,710)
Issuance of stock awards, net of cancellations (in shares)		547
Issuance of stock awards, net of cancellations		$ 1		(1)
Common stock issued for general unsecured claims (in shares)		200
Stock-based compensation	1,417			1,417
Issuance of warrants for general unsecured claims (in shares)			247
Tax withholdings paid in exchange for shares withheld on employee vested stock awards	(899)			(899)
Net Income (loss)	$ 116,738				116,738
Ending Balance (in shares) at Dec. 31, 2021	36,675	36,675	6,981
Ending Balance at Dec. 31, 2021	$ 245,322	$ 37	$ 88,520	1,062,737	(905,972)
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of ASU 2016-02	245,322	$ 37	88,520	1,062,737	(905,972)
Issuance of stock awards, net of cancellations (in shares)		193
Stock-based compensation	1,603			1,603
Tax withholdings paid in exchange for shares withheld on employee vested stock awards	(1,177)			(1,177)
Warrants exercised	6		$ (2)	8
Cancellation of expired warrants (in shares)			(6,981)
Cancellation of expired warrants	0		$ (88,518)	88,518
Net Income (loss)	$ 242,168				242,168
Ending Balance (in shares) at Dec. 31, 2022	36,868	36,868	0
Ending Balance at Dec. 31, 2022	$ 487,922	$ 37	$ 0	1,151,689	(663,804)
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of ASU 2016-02	$ 487,922	$ 37	$ 0	$ 1,151,689	$ (663,804)