Credit Facilities and Notes Payable (Details 1) - Prudential [Member] - Carbon California [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total principal	$ 46,000	$ 51,500
Less: Deferred notes costs	(175)	(235)
Less: unamortized debt discount	(1,084)	(1,346)
Total notes payable - related party	44,741	49,919
Senior Revolving Notes [Member]
Debt Instrument [Line Items]
Total principal	33,000	38,500
Subordinated Notes [Member]
Debt Instrument [Line Items]
Total principal	$ 13,000	$ 13,000