Related Party Transactions (Details 1) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Related Party Transaction [Line Items]
Accretion of the Clay Group Loan discount		$ 526	$ 490
Accretion of capitalized financing and legal fees		265	65
Amortization of deferred financing fees		655	0
Interest expense related to the Clay Group Loan		658	713
Interest expense related to the 2018 Credit Facility		180	0
Closing and commitment fees related to credit facilities		27	30
Interest expense related to Komatsu financial loans	[1]	109	235
Accretion of discount and interest on loan		$ 2,420	$ 1,533

[1] Komatsu is not a related party and has only been included in the above table to reconcile the total interest expense incurred for the period … to the amounts capitalized and expensed.