CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]					Predecessor
Balances at Dec. 31, 2016		$ 9	$ 592,663	$ (479,984)	$ 112,688
Balances (in shares) at Dec. 31, 2016		92,991
Increase (Decrease) in Stockholders' Equity
Net income (loss)				535,686	535,686
Sale of preferred stock			352,048		352,048
Sale of preferred stock (in shares)	6
Preferred beneficial conversion feature			48,007		48,007
Conversion of preferred stock		$ 6	(6)
Conversion of preferred stock (in shares)	(6)	55,180
Equity issuance costs			(11,919)		(11,919)
Long-term incentive plan grants (in shares)		2,022
Long-term incentive plan forfeitures (in shares)		(498)
Reduction in shares to cover individuals' tax withholding			(1,995)		(1,995)
Reduction in shares to cover individuals' tax withholding (in shares)		(316)
Stock-based compensation			37,483		37,483
Balances at Dec. 31, 2017		$ 15	1,016,281	55,702	$ 1,071,998
Balances (in shares) at Dec. 31, 2017		149,379
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]					Predecessor
Net income (loss)				45,959	$ 45,959
Common stock issuance		$ 1	63,479		63,480
Common stock issuance (in shares)		9,200
Equity issuance costs			(3,044)		(3,044)
Stock option exercises			323		323
Stock option exercises (in shares)		42
Long-term incentive plan grants (in shares)		2,327
Long-term incentive plan forfeitures (in shares)		(262)
Reduction in shares to cover individuals' tax withholding			(301)		(301)
Reduction in shares to cover individuals' tax withholding (in shares)		(73)
Stock-based compensation			18,629		18,629
Balances at Dec. 31, 2018		$ 16	1,095,367	101,661	$ 1,197,044
Balances (in shares) at Dec. 31, 2018		160,613
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]					Predecessor
Net income (loss)				(1,156,053)	$ (1,156,053)
Common stock issuance		$ 2	322,294		322,296
Common stock issuance (in shares)		16,204
Equity issuance costs			(2,503)		(2,503)
Long-term incentive plan grants (in shares)		4,164
Long-term incentive plan forfeitures (in shares)		(2,101)
Reduction in shares to cover individuals' tax withholding			(494)		(494)
Reduction in shares to cover individuals' tax withholding (in shares)		(1,174)
Stock-based compensation			(10,020)		(10,020)
Cancellation of Predecessor equity		$ (16)	(1,084,853)	1,054,392	(30,477)
Cancellation of Predecessor equity (in shares)		(161,502)
Warrants issued			7,336		7,336
Balances at Oct. 01, 2019					$ 148,431
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]					Predecessor
Balances at Dec. 31, 2018		$ 16	1,095,367	101,661	$ 1,197,044
Balances (in shares) at Dec. 31, 2018		160,613
Balances at Sep. 30, 2019		$ 16	1,084,853	(1,054,392)	$ 30,477
Balances (in shares) at Sep. 30, 2019		161,502
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]					Predecessor
Balances at Oct. 01, 2019					$ 148,431
Increase (Decrease) in Stockholders' Equity
Fair value of equity issued to Predecessor common stockholders					319,793
Equity issuance costs					(2,503)
Balances at Oct. 02, 2019		$ 2	327,127		$ 327,129
Balances (in shares) at Oct. 02, 2019		16,204
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]					Successor
Balances at Oct. 01, 2019					$ 148,431
Increase (Decrease) in Stockholders' Equity
Net income (loss)					(10,460)
Balances at Dec. 31, 2019		$ 2	327,108	(10,460)	316,650
Balances (in shares) at Dec. 31, 2019		16,204
Balances at Oct. 02, 2019		$ 2	327,127		327,129
Balances (in shares) at Oct. 02, 2019		16,204
Increase (Decrease) in Stockholders' Equity
Net income (loss)				(10,460)	(10,460)
Equity issuance costs			(19)		(19)
Balances at Dec. 31, 2019		$ 2	$ 327,108	$ (10,460)	$ 316,650
Balances (in shares) at Dec. 31, 2019		16,204