Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Deficit	Common units A	Common units B	Total
Financial Designation, Predecessor and Successor [Fixed List]								Predecessor
Balance at Dec. 31, 2017	$ 90	$ (50)	$ 129,675		$ (334,883)			$ (205,168)
Balance (in shares) at Dec. 31, 2017	7,990,020
Increase (Decrease) in Stockholders' Equity
Stock-based compensation expense			25					25
Net loss					(36,003)			(36,003)
Balance at Sep. 30, 2018	$ 90	(50)	129,700		(370,886)			(241,146)
Balance (in shares) at Sep. 30, 2018	7,990,020
Members' Equity [Abstract]
Net loss					(36,003)			$ (36,003)
Financial Designation, Predecessor and Successor [Fixed List]								Predecessor
Balance at Jun. 30, 2018	$ 90	(50)	129,692		(350,819)			$ (221,087)
Balance (in shares) at Jun. 30, 2018	7,990,020
Increase (Decrease) in Stockholders' Equity
Stock-based compensation expense			8					8
Net loss					(20,067)			(20,067)
Balance at Sep. 30, 2018	$ 90	$ (50)	$ 129,700		(370,886)			(241,146)
Balance (in shares) at Sep. 30, 2018	7,990,020
Members' Equity [Abstract]
Net loss					(20,067)			(20,067)
Balance (in shares) at Dec. 31, 2018							150,000
Increase (Decrease) in Stockholders' Equity
Net loss					(37,592)			(37,592)
Balance (in shares) at Sep. 30, 2019							142,857
Beginning Balance at Dec. 31, 2018				$ 6,635	1,636	$ 740	$ 130	9,141
Beginning Balance ( in shares) at Dec. 31, 2018						850,000
Members' Equity [Abstract]
Redemption of common units							(7,143)
Net loss					(37,592)			(37,592)
Change in fair value of senior PIK notes				1,484				1,484
Ending Balance at Sep. 30, 2019				8,119	(35,956)	$ 740	$ 130	(26,967)
Ending Balance ( in shares) at Sep. 30, 2019						850,000
Balance (in shares) at Jun. 30, 2019							142,857
Increase (Decrease) in Stockholders' Equity
Net loss					(18,822)			(18,822)
Balance (in shares) at Sep. 30, 2019							142,857
Beginning Balance at Jun. 30, 2019				1,482	(17,134)	$ 740	$ 130	(14,782)
Beginning Balance ( in shares) at Jun. 30, 2019						850,000
Members' Equity [Abstract]
Net loss					(18,822)			(18,822)
Change in fair value of senior PIK notes				6,637				6,637
Ending Balance at Sep. 30, 2019				$ 8,119	$ (35,956)	$ 740	$ 130	$ (26,967)
Ending Balance ( in shares) at Sep. 30, 2019						850,000