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Stockholders' Equity - Additional Information (Detail)	3 Months Ended	6 Months Ended
Stockholders' Equity - Additional Information (Detail)	Dec. 31, 2012	Dec. 31, 2012
Stockholders Equity [Line Items]
Stock issued upon exercise of warrants	542,645	3,120,571
Stock issued upon exercise of options	464,366	560,866
Repurchase of Company stock, shares		116,000

Number of share options (or share units) exercised during the current period.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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