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Subsequent Events - Additional Information (Detail) (USD $) | 1 Months Ended | 6 Months Ended | 119 Months Ended |  |  | 1 Months Ended
--- | --- | --- | --- | --- | --- | ---
Aug. 10, 2012 | Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2013 | Sep. 30, 2012 | Oct. 21, 2011 | Apr. 29, 2013 Subsequent Events [Member] | Apr. 29, 2013 Subsequent Events [Member] Common Stock [Member] | Apr. 29, 2013 Subsequent Events [Member] Series B Preferred Stock [Member]
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Issuance and sale of Common Stock | 2,260,869 |  |  |  |  |  | 14,262,553 | 14,262,553 | 9,900
Common stock, par value |  | $ 0.001 |  | $ 0.001 | $ 0.001 | $ 0.001 |  | $ 0.001 |
Sale of stock, price per share | $ 2.76 |  |  |  |  |  | $ 1.83 | $ 1.83 | $ 1,000.00
Conversion price |  |  |  |  |  |  | $ 1.83 |  |
Aggregate purchase price on issuance of common stock to be received |  |  |  |  |  |  | $ 36,000,472 |  |
Proceeds from issuance of common stock and preferred stock | $ 6,200,000 | $ 7,089,327 | $ 2,696,333 | $ 113,342,338 |  |  | $ 35,350,000 |  |
Cash penalty percentage |  |  |  |  |  |  | 10.00% |  |
Percentage of number of shares of common stock outstanding |  |  |  |  |  |  | 9.99% |  |
Description of registration |  |  |  |  |  |  | The Company is required to prepare and file a registration statement with the Securities and Exchange Commission within 30 days of the closing of the offering, and to use commercially reasonable efforts to have the registration statement declared effective within 90 days of the closing date if there is no review by the Securities and Exchange Commission, and within 120 days of the closing date in the event of such review. |  |

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