SPECIAL PURPOSE ENTITIES - Moxie Additional Information (Details)	1 Months Ended		12 Months Ended
	Nov. 30, 2015 USD ($)	Aug. 31, 2014 MW	Jan. 31, 2016 USD ($)	Jan. 31, 2015 USD ($) project	Jan. 31, 2014 USD ($)
Variable Interest Entity
Gains on the deconsolidation of variable interest entities			$ 349,000		$ 2,444,000
Gemma Power, Inc.
Variable Interest Entity
Notes payable and accrued interest paid	$ 1,940,000
Development success fees paid	1,703,000
Variable Interest Entity
Variable Interest Entity
Nominal capacity of natural gas-fired power plant | MW		1,040
Gains on the deconsolidation of variable interest entities					2,444,000
Investment income interest					$ 952,000
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity
Notes receivable and accrued interest			$ 4,258,000
Interest rate on loan receivable			20.00%
Project development support costs included in accrued expenses	633,000
Development success fee	$ 4,258,000
Capitalized project costs			$ (4,871,000)
Loan approved percentage			40.00%
Cash received pursuant to participation agreement			$ 1,703,000	$ 755,000
Interest rate on cash received				20.00%
Percentage of development success fee to be shared with equipment seller, not yet earned				40.00%
Gains on the deconsolidation of variable interest entities			$ 349,000
Moxie Energy LLC
Variable Interest Entity
Number of natural gas-fired power plants | project				2