Annual report pursuant to Section 13 and 15(d)

Summary of Selected Quarterly Financial Data (unaudited) (Detail) - Unaudited quarterly financial data

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Summary of Selected Quarterly Financial Data (unaudited) (Detail) - Unaudited quarterly financial data (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Jul. 31, 2012
Apr. 30, 2012
Jan. 31, 2012
Oct. 31, 2011
Jul. 31, 2011
Apr. 30, 2011
Jan. 31, 2011
Oct. 31, 2010
Dec. 31, 2012
Jul. 31, 2012
Dec. 31, 2011
Jul. 31, 2011
Dec. 31, 2010
Jul. 31, 2010
Total revenues $ 26,408 $ 25,949 $ 24,973 $ 25,753 $ 26,816 $ 25,827 $ 23,734 $ 25,652            
Gross profit 11,673 12,056 11,579 11,802 12,042 12,364 10,331 13,473            
Loss before income taxes (29,074) (3,445) (4,076) (4,326) (4,199) (2,002) (5,562) (1,060)   (40,921)   (12,823)   (22,261)
Net loss $ (27,143) $ (3,411) $ (4,221) $ (4,494) $ (4,020) $ (2,110) $ (5,708) $ (1,122) $ (39,269) $ (39,269) $ (12,960) $ (12,960) $ (22,233) $ (22,233)
Basic and diluted loss per common share (in Dollars per share) $ (0.69) $ (0.09) $ (0.11) $ (0.12) $ (0.11) $ (0.05) $ (0.15) $ (0.03) $ (1.01) $ (1.01) $ (0.34) $ (0.34) $ (0.59) $ (0.59)