Debt - Components of Debt (Details) - USD ($) $ in Thousands	6 Months Ended			12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	[1]	Dec. 31, 2015
Debt Instrument [Line Items]
Total current debt	$ 5,306			$ 27,806
Total long-term debt	18,441			20,931
Total debt	23,747			48,737
Paid in-kind interest	155	$ 0
Senior Credit Facility
Debt Instrument [Line Items]
Letters of credit issued	$ 17,200			$ 21,500
Weighted average interest rate on current portion of debt	4.21%			3.90%
Senior Credit Facility | Acquisition Line
Debt Instrument [Line Items]
Total long-term debt	$ 11,939			$ 14,592
Convertible Subordinated Notes
Debt Instrument [Line Items]
Total long-term debt	6,502			6,339
Paid in-kind interest	200
Convertible Subordinated Notes | Oasis Note
Debt Instrument [Line Items]
Unamortized discount	700			700
Senior Credit Facility | Working Capital Line
Debt Instrument [Line Items]
Total current debt	0			22,500
Senior Credit Facility | Acquisition Line
Debt Instrument [Line Items]
Total current debt	$ 5,306			$ 5,306

[1] Financial information has been recast to include results attributable to the acquisition of Oasis Power Holdings LLC from an affiliate on May 12, 2015. See Note 2 "Basis of Presentation" for further discussion.