Unaudited Condensed Consolidated Statement of Changes in Stockholders' (Deficit) Equity - USD ($) $ in Thousands	Total	Series A-1 Preferred Stock	Common Stock Class A Voting Common Stock	Preferred stock Series A-1 Preferred Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2018			24,645,825	91,784
Beginning balance at Dec. 31, 2018	$ 222,547		$ 142,655		$ 174,379	$ (94,487)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment-in-kind dividends (in shares)				2,065
Stock-based compensation (in shares)			127,818
Stock-based compensation	627				627
Net income (loss)	(58,564)					(58,564)
Ending balance (in shares) at Mar. 31, 2019			24,773,643	93,849
Ending balance at Mar. 31, 2019	164,610		$ 142,655		175,006	(153,051)
Beginning balance (in shares) at Dec. 31, 2018			24,645,825	91,784
Beginning balance at Dec. 31, 2018	222,547		$ 142,655		174,379	(94,487)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(29,058)
Ending balance (in shares) at Sep. 30, 2019			24,933,853	98,120
Ending balance at Sep. 30, 2019	194,819		$ 142,655		175,709	(123,545)
Beginning balance (in shares) at Mar. 31, 2019			24,773,643	93,849
Beginning balance at Mar. 31, 2019	164,610		$ 142,655		175,006	(153,051)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment-in-kind dividends (in shares)				2,112
Stock-based compensation (in shares)			160,210
Stock-based compensation	703				703
Net income (loss)	13,289					13,289
Ending balance (in shares) at Jun. 30, 2019			24,933,853	95,961
Ending balance at Jun. 30, 2019	178,602		$ 142,655		175,709	(139,762)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment-in-kind dividends (in shares)				2,159
Net income (loss)	16,217					16,217
Ending balance (in shares) at Sep. 30, 2019			24,933,853	98,120
Ending balance at Sep. 30, 2019	194,819		$ 142,655		175,709	(123,545)
Beginning balance (in shares) at Dec. 31, 2019			24,945,594	100,328
Beginning balance at Dec. 31, 2019	120,887		$ 142,655		175,738	(197,506)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment-in-kind dividends (in shares)				2,257
Stock-based compensation (in shares)			308,435
Stock-based compensation	240				240
Net income (loss)	(110,791)					(110,791)
Ending balance (in shares) at Mar. 31, 2020			25,254,029	102,585
Ending balance at Mar. 31, 2020	10,336		$ 142,655		175,978	(308,297)
Beginning balance (in shares) at Dec. 31, 2019			24,945,594	100,328
Beginning balance at Dec. 31, 2019	120,887		$ 142,655		175,738	(197,506)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment-in-kind dividends (in shares)		4,565
Net income (loss)	(186,186)
Ending balance (in shares) at Sep. 30, 2020			25,312,211	104,893
Ending balance at Sep. 30, 2020	(65,025)		$ 142,655		176,012	(383,692)
Beginning balance (in shares) at Mar. 31, 2020			25,254,029	102,585
Beginning balance at Mar. 31, 2020	10,336		$ 142,655		175,978	(308,297)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment-in-kind dividends (in shares)				2,308
Stock-based compensation (in shares)			58,182
Stock-based compensation	28				28
Net income (loss)	(40,593)					(40,593)
Ending balance (in shares) at Jun. 30, 2020			25,312,211	104,893
Ending balance at Jun. 30, 2020	(30,229)		$ 142,655		176,006	(348,890)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	6				6
Net income (loss)	(34,802)					(34,802)
Ending balance (in shares) at Sep. 30, 2020			25,312,211	104,893
Ending balance at Sep. 30, 2020	$ (65,025)		$ 142,655		$ 176,012	$ (383,692)