Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Class A Voting Common Stock	Series A-1 and Series B Preferred Stock	Common Stock Class A Voting Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2015	$ 182,966			$ 142,638	$ 10,270	$ 30,818	$ (760)
Beginning balance (in shares) at Dec. 31, 2015				7,521,788
Sale of common stock, net of offering costs	71,817			$ 14	71,803
Sale of common stock, net of offering costs (in shares)				13,800,000
Shares issued for asset acquisition	5,499				5,499
Shares issued for asset acquisition (in shares)				500,227
Stock-based compensation	448				448
Foreign currency translation					(760)		$ 760
Net loss	(94,335)					(94,335)
Ending balance at Dec. 31, 2016	166,395			$ 142,652	87,260	(63,517)
Ending balance (in shares) at Dec. 31, 2016		21,822,015		21,822,015
Shares issued for asset acquisition	14,360		$ 3		14,357
Shares issued for asset acquisition (in shares)			2,690,032
Dividends on Series A-1 and Series A-2 Preferred stock	(296)					(296)
Stock-based compensation	490				490
Net loss	(20,096)					(20,096)
Ending balance at Jun. 30, 2017	$ 160,853		$ 3	$ 142,652	$ 102,107	$ (83,909)
Ending balance (in shares) at Jun. 30, 2017		21,822,015		21,822,015
Ending balance (in shares) at Jun. 30, 2017			2,690,032