Condensed Consolidated Statement of Stockholders' Deficit (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2018		21,660,638
Balance at Dec. 31, 2018	$ (158,756)	$ 2	$ 259,298	$ (417,660)	$ (396)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Net loss	(6,724)			(6,724)
Share-based payments	128		128
Interest rate collar	88				88
Balance at Mar. 31, 2019	(165,264)	$ 2	259,426	(424,384)	(308)
Balance (in shares) at Mar. 31, 2019		21,660,638
Balance (in shares) at Dec. 31, 2018		21,660,638
Balance at Dec. 31, 2018	(158,756)	$ 2	259,298	(417,660)	(396)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Net loss	(30,157)
Balance at Sep. 30, 2019	(15,785)	$ 5	432,027	(447,817)	0
Balance (in shares) at Sep. 30, 2019		49,033,903
Balance (in shares) at Dec. 31, 2018		21,660,638
Balance at Dec. 31, 2018	(158,756)	$ 2	259,298	(417,660)	(396)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Reverse capitalization			172,300
Balance at Dec. 31, 2019	$ (12,130)	$ 5	432,577	(444,712)	0
Balance (in shares) at Dec. 31, 2019	49,033,903	49,033,903
Balance (in shares) at Mar. 31, 2019		21,660,638
Balance at Mar. 31, 2019	$ (165,264)	$ 2	259,426	(424,384)	(308)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Net loss	(5,423)			(5,423)
Share-based payments	52		52
Interest rate collar	(476)				(476)
Balance at Jun. 30, 2019	(171,111)	$ 2	259,478	(429,807)	(784)
Balance (in shares) at Jun. 30, 2019		21,660,638
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Net loss	(18,010)
Share-based payments	283		283
Interest rate collar	784				784
Reverse capitalization (in shares)		27,373,265
Reverse capitalization	172,269	$ 3	172,266
Balance at Sep. 30, 2019	$ (15,785)	$ 5	432,027	(447,817)	0
Balance (in shares) at Sep. 30, 2019		49,033,903
Balance (in shares) at Dec. 31, 2019	49,033,903	49,033,903
Balance at Dec. 31, 2019	$ (12,130)	$ 5	432,577	(444,712)	0
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Net loss	(15,969)			(15,969)
Share-based payments	559		559
Balance at Mar. 31, 2020	$ (27,540)	$ 5	433,136	(460,681)	0
Balance (in shares) at Mar. 31, 2020		49,033,903
Balance (in shares) at Dec. 31, 2019	49,033,903	49,033,903
Balance at Dec. 31, 2019	$ (12,130)	$ 5	432,577	(444,712)	0
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Net loss	(13,946)
Balance at Sep. 30, 2020	$ (24,407)	$ 5	434,246	(458,658)	0
Balance (in shares) at Sep. 30, 2020	49,033,903	49,033,903
Balance (in shares) at Mar. 31, 2020		49,033,903
Balance at Mar. 31, 2020	$ (27,540)	$ 5	433,136	(460,681)	0
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Net loss	(13,150)			(13,150)
Share-based payments	453		453
Balance at Jun. 30, 2020	(40,237)	$ 5	433,589	(473,831)	0
Balance (in shares) at Jun. 30, 2020		49,033,903
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Net loss	15,173			15,173
Share-based payments	657		657
Interest rate collar	0
Balance at Sep. 30, 2020	$ (24,407)	$ 5	$ 434,246	$ (458,658)	$ 0
Balance (in shares) at Sep. 30, 2020	49,033,903	49,033,903