Unaudited Balance Sheets of Schneider Power, Classified as Discontinued Operations Held for Sale (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012		Mar. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 1,549,302		$ 2,013,738		$ 10,710,970	$ 3,798,181
Accounts receivable, net	3,390,043		3,500,299
Prepaids and other current assets	2,540,304		1,937,970
Total current assets	10,950,339		10,963,476
Non-Current Assets:
Property and equipment, net	3,547,718		3,209,643
Goodwill	12,400,000		12,400,000
Deposits and other assets	295,853		386,693
Current Liabilities:
Accounts payable	5,834,886		4,194,498
Accrued payroll obligations	857,962		738,737
Other accrued liabilities	1,106,934		1,174,902
Current portion of debt obligations	10,970,497		9,578,723
Total current liabilities	23,418,728		21,158,888
Non-Current Liabilities:
Debt obligations, net of current portion	2,280,022		2,481,827
Segment, Discontinued Operations | Schneider Power
Current Assets:
Cash and cash equivalents	32,503		578,080
Accounts receivable, net	613,811		454,088
Prepaids and other current assets	400,718		670,794
Total current assets	1,047,032		1,702,962
Non-Current Assets:
Property and equipment, net	25,378,293	[1]	25,959,563	[1]
Intangible asset, net	3,128,907	[2]	3,924,327	[2]
Goodwill	1,228,036	[3]	2,308,383	[3]
Deposits and other assets	325,790		331,223
Total non-current assets	30,061,026		32,523,496
Current Liabilities:
Accounts payable	703,846		933,377
Accrued payroll obligations	14,837		33,390
Other accrued liabilities	82,602		316,314
Current portion of debt obligations	1,197,716	[4]	2,227,668	[4]
Total current liabilities	1,999,001		3,510,749
Non-Current Liabilities:
Debt obligations, net of current portion	23,935,866	[4]	23,251,117	[4]
Deferred income taxes	143,559		146,847
Total non-current liabilities	24,079,425		23,397,964
Impairment	700,000
Zephyr Farms Limited
Non-Current Liabilities:
Capacity of plant	10.0
Zephyr Farms Limited | Segment, Discontinued Operations | Schneider Power
Non-Current Liabilities:
Impairment	$ 1,000,000
Providence Bay Wind Farm
Non-Current Liabilities:
Capacity of plant	1.6

[1] Consists mainly of wind turbine assets of the 10 megawatt Zephyr Wind Farm acquired in April 2012 and the 1.6 megawatt Providence Bay Wind Farm acquired in April 2010.

[2] Consists of project assets acquired with our acquisition of Schneider Power in April 2010 associated with Schneider Power's renewable energy portfolio and power purchase agreements associated with Schneider Power's acquisition of the Zephyr Wind Farm in April 2012 and reflects impairments of $0.7 million recognized as of March 31, 2013.

[3] Represents goodwill ascribed to the Zephyr Wind Farm acquisition in April 2012 and reflects $1.0 million impairment recognized as of March 31, 2013.

[4] Consists of obligations to secured project lenders as follows:Zephyr Wind Farm - Samsung Debt In connection with the Schneider Power's acquisition of the Zephyr Wind Farm on April 20, 2012, Schneider Power assumed a credit facility owed to Samsung Heavy Industries Co. Ltd (Samsung) related to the project (the Samsung Debt). The term loan had a total principal and interest amount of Canadian Dollar (CAD) $23.2 million as of the date of the acquisition. Pursuant to the terms of the original credit facility, Zephyr Farms Limited (Zephyr) was to make regularly scheduled semi-annual principal and interest payments, accruing at a rate of 6.5% per annum, for a period of ten years. On March 19, 2013, Schneider Power and Zephyr entered into a Master Amending Agreement with Samsung to resolve certain issues with respect to the performance of wind turbines purchased by Zephyr from Samsung pursuant to which the parties agreed to, among other things, (i) extend the grace period to January 31, 2013 and extend the wind turbine delivery date to February 1, 2013 under a turbine supply agreement; thus, allowing additional time for Samsung to optimize the wind turbines before the “Availability Guarantee Period” would begin, (ii) waive all obligations under an operations and maintenance agreement that would have been payable to Samsung through January 31, 2013, and (iii) waive a portion of the interest component that would have been payable to Samsung through January 31, 2013 and restructure the repayment terms of the principal obligations owed by Zephyr to Samsung under the credit facility. Under the original repayment terms, Zephyr was to repay the Samsung Debt, together with interest at a rate of 6.5% per year, over a 10 year period as follows: (1) eighteen semi-annual payments of principal and interest in the approximately amount of CAD $1.05 million commencing nine months following the date that the Zephyr wind farm achieved commercial operations (which event occurred in May 2012) , (ii) a principal balloon payment in year five in the approximate amount of CAD $5.3 million and (iii) a final payment in year ten in the approximate amount of CAD $9.6 million. Pursuant to the terms of the Master Amending Agreement, Zephyr is now obligated to repay the Samsung Debt, together with interest at a rate of 6.5% per year, over a ten year period as follows: (i) an interest payment of CAD $100,000 that was made before March 31, 2013, (ii) an interest only payment in the approximate amount of CAD $1.3 million on July 31, 2013, (iii) nineteen semi-annual payments of principal and interest in the approximate amount of CAD $1.10 million commencing on January 31, 2014, (iv) a principal balloon payment in the approximate amount of CAD $2.15 on each of January 31, 2018 and July 31, 2018, (v) a principal balloon payment in the approximate amount of CAD $4.9 million on July 31, 2022 and (vi) a final payment in the approximate amount of CAD $5.1 million on January 31, 2023. Based on the present value of the cash flows of the amended Samsung Debt, we determined that the modified terms were not substantially different from the original payment terms. As of March 31, 2013, the total amount of the Samsung Debt was CAD $24.5 million, which consisted of CAD $22.7 million of principal, CAD $0.9 million of unamortized premium and CAD $0.9 million of accrued interest.In connection with the execution of the Master Amending Agreement, Zephyr and Samsung also executed an Amended and Restated Credit Agreement. Except for the modifications to the repayment terms of the principal and interest obligations owed under the Credit Agreement, no other material amendments were made to the Credit Agreement. The Samsung Debt is secured by substantially all of Zephyr's assets. Pursuant to the Master Amending Agreement, the parties also agreed to establish February 1, 2013 as the deemed delivery date for the wind turbines. As a result of establishing a new delivery date for the wind turbines, (i) Zephyr waived any rights it had to claim liquidated damages from Samsung up through January 31, 2013 related to the performance of the wind turbines and (ii) Samsung agreed to waive (a) all obligations owed by Zephyr through January 31, 2013 owing under an operations and maintenance agreement applicable to the wind turbines and (b) its right to receive any interest on the TSA portion of the Samsung Debt up through January 31, 2013.The conversion rate of one CAD to one US Dollar was 1.005 to 1.0 as of December 31, 2012 and 0.982 to 1.0 as of March 31, 2013.Bank Term Loan - Providence Bay Wind FarmIn connection with our acquisition of Schneider Power on April 16, 2010, we assumed a bank term loan (Bank Term Loan) that had an original principal amount of CAD $1.5 million upon its inception on April 3, 2007. The Bank Term Loan was executed by our wholly-owned tier-three subsidiary, Schneider Power Providence Bay Inc. (SPI Providence Bay), and is secured by certain of SPI Providence Bay’s power generation machinery, equipment and other assets.The significant terms of the Bank Term Loan as last amended in April 10, 2012 are as follows: (i) scheduled maturity date of April 10, 2017, (ii) interest at 6.0% per annum, and (iii) required fixed cash payments of CAD $12,899 per month through April 10, 2017, with the remaining principal amount of CAD $667,422 due on the maturity date.As of March 31, 2013, the total amount of principal and interest due under the Bank Term Loan was $1.1 million.