SPECIAL PURPOSE ENTITIES - Moxie Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2015	Jan. 31, 2017	Jan. 31, 2016
Variable Interest Entity
Gain on deconsolidation			$ 349
Gemma Power, Inc.
Variable Interest Entity
Notes payable and accrued interest shared with supplier	$ 1,900
Development success fees paid	1,700
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity
Interest rate on loan receivable		20.00%
Accrued interest paid to GPI at closing	600
Development success fee received	$ 4,300
Capitalized project costs			4,900
Loan participation percentage of the supplier	40.00%
Cash received pursuant to participation agreement	$ 1,700
Interest rate on borrowings	20.00%
Percentage of development success fee to be shared with equipment seller, not yet earned	40.00%
The total amount of loans made to the VIE from inception of the arrangement plus accrued interest	$ 4,300
Gain on deconsolidation			$ 300