Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Detail) - Schedule of Stock option plans

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Stockholders' Equity (Detail) - Schedule of Stock option plans (USD $)
6 Months Ended 9 Months Ended
Jan. 17, 2013
Apr. 30, 2013
Outstanding at July 31, 2012 736,490 736,490
Outstanding at July 31, 2012 (in Dollars per share) $ 14.53 $ 14.53
Awarded 2.88 336,817
Awarded (in Dollars per share)   $ 2.88
Cancelled   (346,662)
Cancelled (in Dollars per share)   $ 11.82
Outstanding at end of period   726,645
Outstanding at end of period (in Dollars per share)   $ 10.39
Outstanding at end of period   2 years 328 days
Options vested at end of period   389,828
Options vested at end of period (in Dollars per share)   $ 2.88
Options vested at end of period   1 year 73 days