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Organization and Significant Accounting Policies - Additional Information (Detail) (USD $) | 1 Months Ended | 6 Months Ended | 12 Months Ended | 131 Months Ended |
--- | --- | --- | --- | --- | ---
May 31, 2013 | Mar. 31, 2014 | Mar. 31, 2013 | Sep. 30, 2013 | Mar. 31, 2014 | Sep. 30, 2012
Schedule Of Investments [Line Items] |  |  |  |  |  |
Cash to fund operations |  | $ 142,847,860 | $ 3,313,483 | $ 19,114,444 | $ 142,847,860 | $ 3,377,288
Maturity description |  | Less than 30 months |  |  |  |
Net increase (decrease) in cash |  | 123,733,416 | (63,805) |  | 142,847,860 |
Cash from issuance of equity | 36,000,000 | 172,600,000 |  |  |  |
Net cash invested in fixed income investments |  | 41,400,000 |  |  |  |
Cash outflow related to continuing operating activities |  | 14,700,000 |  |  |  |
Capital expenditures |  | 600,000 |  |  |  |
Restricted Cash |  | 0 | 0 |  | 0 |
Amount insured in FDIC per account |  | 250,000 |  |  | 250,000 |
Amortized cost of bonds |  | 51,846,834 |  | 10,732,414 | 51,846,834 |
Unrealized Loss on Securities |  | 283,376 |  | 41,643 |  |
Unrealized Gain on Securities |  | 0 |  | 7,500 |  |
Fair value of investments |  | 51,563,458 |  | 10,698,271 | 51,563,458 |
Minority equity investment, book value |  | 0 |  |  | 0 |
Minimum |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  | 3 years |  |  |  |
Maximum |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  | 7 years |  |  |  |
Commercial Bonds |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |
Maturity description |  | Less than 30 months |  |  |  |
Investments |  | 51,800,000 |  |  | 51,800,000 |
Warrants Issued |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |
Cash from exercise of Warrants |  | $ 8,000,000 |  |  |  |

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