Credit Facilities (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Line Of Credit Facility [Line Items]
Long-term Debt	$ 78
Carbon California [Member]
Line Of Credit Facility [Line Items]
Senior Revolving Notes, related party, due February 15, 2022	38,500
Subordinated Notes, related party, due February 15, 2024	13,000
Long-term Debt	78
Total gross notes payable	51,578
Less: Deferred notes costs	(232)
Less: Notes discount	(1,368)
Total net notes payable	$ 49,978