SPECIAL PURPOSE ENTITIES - Moxie Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Nov. 30, 2015	Jul. 31, 2015	Apr. 30, 2015
Gemma Power, Inc.
Variable Interest Entity
Participation sharing percentage of supplier	40.00%
Development success fee shared with supplier	$ 1.7
Notes payable and accrued interest shared with supplier	1.9
Variable Interest Entity
Variable Interest Entity
Development loans to Moxie Freedom including escrowed interest	4.3
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity
Accrued interest received	$ 0.6
Interest rate on loan receivable	20.00%
Development success fee received	$ 4.3
Capitalized project costs		$ (4.9)
Loans made during the period			$ 0.6
Cash received pursuant to participation agreement	$ 1.7		$ 0.3
Interest rate on borrowings	20.00%
Gains on the deconsolidation of variable interest entities		$ 0.3