CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 6 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Operating Activities:    
Net loss $ (2,663,739) $ (5,838,828)
Adjustments to reconcile net loss to net cash used by operating activities:    
Depreciation and amortization 1,502,114 1,536,119
Stock based compensation 471,662 852,044
Net changes in:    
Accounts receivable (453,702) (92,266)
Accounts payable and accrued liabilities (358,469) 160,436
Prepaid expenses and other 287,547 (76,545)
Total cash used by operating activities (1,214,587) (3,459,040)
Investing Activities:    
Purchases of property, plant and equipment (3,658,285) (14,443,388)
Cash restricted by regulating entities (75,000) (2,225,000)
Cash received from consolidation of subsidiary 0 592,330
Distributions to non-controlling interest (58,765) (55,868)
PPA operating security deposit (1,426,700) 0
Total cash used by investing activities (5,218,750) (16,131,926)
Financing Activities:    
Issuance of share capital, net of share issue costs 1,343,639 78,276
Proceeds received from non-controlling interest 7,005,785 13,790,260
Principal payments on note payable 0 (230,000)
Principal payments on capital lease (36,518) (6,247)
Total cash provided by financing activities 8,312,906 13,632,289
Increase (Decrease) in Cash and Cash Equivalents 1,879,569 (5,958,677)
Cash and Cash Equivalents, Beginning of Period 4,433,051 8,098,905
Cash and Cash Equivalents, End of Period 6,312,620 2,140,228
Supplemental Disclosures:    
Purchase of property and equipment on account 15,631,269 723,398
Construction and development paid directly with construction loans 41,771,878 0
Capitalized accrued interest 925,093 676,753
Net assets and liabilities received from consolidation of subsidiary 0 45,386,103
Grant receivable used to decrease construction costs 10,653,382 0
Other Items:    
Interest paid $ 340,650 $ 3,548