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Organization and Significant Accounting Policies - Additional Information (Detail) (USD $) | 1 Months Ended | 12 Months Ended | 125 Months Ended |  |  | 12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 31, 2013 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Oct. 21, 2011 Employee | Sep. 30, 2011 | Sep. 30, 2013 Minimum | Sep. 30, 2013 Maximum | Sep. 30, 2013 Commercial bonds | Oct. 11, 2013 Subsequent Event | Oct. 31, 2013 Subsequent Event | Sep. 30, 2013 Wise Power
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash for fund operations |  | $ 19,114,444 | $ 3,377,288 | $ 19,114,444 |  | $ 7,507,389 |  |  |  |  |  |
Maturity description |  | less than 24 months |  |  |  |  |  |  | less than 18 months |  |  |
Net increase (decrease) in cash |  | 15,737,156 | (4,130,101) | 19,114,444 |  |  |  |  |  |  |  |
Cash from issuance of equity | 36,000,000 | 44,500,000 |  |  |  |  |  |  |  | 60,000,000 | 60,000,000 |
Cash outflow related to continuing operating activities |  | 19,800,000 |  |  |  |  |  |  |  |  |  |
Proceeds from sale of investments |  | 1,419,079 | 509,009 | 4,732,688 |  |  |  |  |  |  |  | 1,400,000
Proceeds from Revenue |  | 200,000 |  |  |  |  |  |  |  |  |  |
Capital expenditures |  | 300,000 |  |  |  |  |  |  |  |  |  |
Investments |  |  |  |  |  |  |  |  | 10,800,000 |  |  |
Number of employees at the time of acquisition |  |  |  |  | 41 |  |  |  |  |  |  |
Amount insured in FDIC per account |  | 250,000 |  | 250,000 |  |  |  |  |  |  |  |
Amortized cost of bonds |  | 10,732,414 |  | 10,732,414 |  |  |  |  |  |  |  |
Unrealized Loss on Securities |  | 41,643 |  |  |  |  |  |  |  |  |  |
Unrealized Gain on Securities |  | 7,500 |  |  |  |  |  |  |  |  |  |
Fair value of investments |  | 10,698,271 |  | 10,698,271 |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  | 3 years | 7 years |  |  |  |
Minority equity investment, book value |  | 0 |  | 0 |  |  |  |  |  |  |  |
Restricted Cash |  | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |  |

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