Consolidated Statements of Changes in Stockholders’ Equity/Member’s Deficit Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance (in shares) at Dec. 31, 2015		10,000,000
Beginning balance at Dec. 31, 2015	$ 100,537	$ 149	$ 177,276	$ (75,077)	$ (1,811)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(81,374)			(81,374)
Foreign currency translation adjustment	(2,735)				(2,735)
Issuance of common stock (in shares)		4,932,000
Issuance of common stock	0	$ 0	0
Ending balance (in shares) at Dec. 31, 2016		14,932,000
Ending balance at Dec. 31, 2016	16,428	$ 149	177,276	(156,451)	(4,546)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(45,106)			(45,106)
Foreign currency translation adjustment	$ 743				743
Ending balance (in shares) at Dec. 31, 2017	23,208,076	14,932,000
Ending balance at Dec. 31, 2017	$ (27,935)	$ 149	177,276	(201,557)	(3,803)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares issued (in shares)	23,208,076
Net loss	$ (20,846)			(20,846)
Foreign currency translation adjustment	29				29
Issuance of common stock (in shares)		11,788,000
Issuance of common stock	$ 171,528	$ 118	171,410
Ending balance (in shares) at Dec. 31, 2018	35,353,296	35,353,000
Ending balance at Dec. 31, 2018	$ 135,804	$ 353	361,628	$ (222,403)	$ (3,774)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	74,722	75,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	$ 10,933		10,933
Stock Issued During Period, Shares, Stock Splits		8,277,000
Stock Issued During Period, Value, Stock Splits		$ 83	(83)
Stock Issued During Period, Reclassifications, Shares		171,000
Stock Issued During Period, Reclassifications, Value	1,321	$ 2	1,319
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		112,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	$ 0	0
Stock Issued During Period, Value, Stock Options Exercised	$ 774	$ 1	$ 773
Common stock, shares issued (in shares)	35,353,296