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Stockholders' Equity (Narrative) (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 1 Months Ended | 12 Months Ended |  | 1 Months Ended
--- | --- | --- | --- | ---
Jan. 31, 2011 Year | Jun. 30, 2012 | Jun. 30, 2011 | Aug. 31, 2012 Subsequent Event Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common stock issued to institutional investors | 2,210,000 |  |  | 2,494,419
Number of warrants to purchase shares of common stock issued | 552,500 |  |  | 623,605
Proceeds from issuance of common stock and warrants | $ 11.05 |  |  | $ 5.40
Issue price per unit | $ 5.00 |  |  | $ 2.15
Percentage of warrants on common stock | 25.00% |  |  | 25.00%
Warrant exercise price | $ 5.00 |  |  | $ 2.50
Term of warrants | 5 |  |  | 5
Stock issuance costs | $ 1.0 |  |  | $ 7.0
Weighted average exercise price of warrants |  | $ 7.80 | $ 8.14 |
Outstanding warrants expiration date |  | July 19, 2012 |  |

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