Royalty Payable (Details) - USD ($) $ in Thousands	Feb. 28, 2018	Dec. 31, 2017
Schedule of Royalties [Line Items]
Net Profit %		16.70%
Royalty payable at December 31, 2017		$ 1,408
Subsequent Event
Schedule of Royalties [Line Items]
Percent of counterparty payable offset by guarantor	50.00%
Royalty commitment	$ 6,250
Potomac
Schedule of Royalties [Line Items]
Net Profit %		10.20%
Royalty payable at December 31, 2017		$ 860
LYL
Schedule of Royalties [Line Items]
Net Profit %		5.00%
Royalty payable at December 31, 2017		$ 421
Welmers
Schedule of Royalties [Line Items]
Net Profit %		1.50%
Royalty payable at December 31, 2017		$ 127