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The duration of a warranty before it expires.

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Fair value portion of guarantee, including, but not limited to, financial standby letter of credit, fair value guarantee, guarantee of collection of scheduled contractual cash flows from financial assets, and contracts that contingently require the guarantor to make payments or perform services.

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Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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Amount of long-term debt and capital lease obligations including current maturities.

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The minimum amount the entity agreed to spend under the long-term purchase commitment.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Schedule of Commitments and Contingencies (Details) [Line Items]
Financing and capital lease obligations non current	$ 9,956,000		$ 10,092,000
Operating Leases, Rent Expense	436,000us-gaap_LeaseAndRentalExpense	66,000us-gaap_LeaseAndRentalExpense
Solar Modules [Member]
Schedule of Commitments and Contingencies (Details) [Line Items]
Warranty Term	25 years
Inverter and balance of system components [Member] \| Minimum [Member]
Schedule of Commitments and Contingencies (Details) [Line Items]
Warranty Term	5 years
Inverter and balance of system components [Member] \| Maximum [Member]
Schedule of Commitments and Contingencies (Details) [Line Items]
Warranty Term	10 years
Solar Energy Systems [Member]
Schedule of Commitments and Contingencies (Details) [Line Items]
Product Warranty Accrual	0		0
Photovoltaic (PV) Solar Systems [Member]
Schedule of Commitments and Contingencies (Details) [Line Items]
Long-term Purchase Commitment, Amount	56,468,000		59,354,000
Aerojet1 Project [Member]
Schedule of Commitments and Contingencies (Details) [Line Items]
Guarantees, Fair Value Disclosure	67,000		71,000
Aerojet1 Project [Member] \| Guarantee Obligations [Member]
Schedule of Commitments and Contingencies (Details) [Line Items]
Financing and capital lease obligations total	10,775,000		10,911,000
Financing and capital lease obligations non current	9,956,000		10,092,000
Financing and capital lease obligations recorded as other current liabilities	819,000		819,000
Greystone [Member]
Schedule of Commitments and Contingencies (Details) [Line Items]
Redeemable Noncontrolling Interest, Equity, Carrying Amount	$ 1,000,000