Annual report pursuant to Section 13 and 15(d)

Summary of Selected Quarterly Financial Data (unaudited) (Details) - Quarterly Financial Data

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Summary of Selected Quarterly Financial Data (unaudited) (Details) - Quarterly Financial Data (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Jul. 31, 2014
Apr. 30, 2014
Jan. 31, 2014
Oct. 31, 2013
Jul. 31, 2013
Apr. 30, 2013
Jan. 31, 2013
Oct. 31, 2012
Jul. 31, 2014
Jul. 31, 2013
Jul. 31, 2012
Quarterly Financial Data [Abstract]                      
Total revenues $ 24,907 $ 23,978 $ 22,928 $ 24,134 $ 23,269 $ 22,598 $ 22,210 $ 25,630      
Gross profit 10,935 10,394 9,771 10,579 9,446 9,048 8,642 11,736      
Loss before income taxes (3,162) (448) (3,570) (2,725) (3,532) (5,808) (5,854) (3,755) (9,905) (18,949) (40,921)
Net loss $ (3,169) $ (455) $ (3,566) $ (2,787) $ (3,102) $ (5,770) $ (5,674) $ (3,691) $ (9,977) $ (18,237) $ (39,269)
Basic and diluted loss per common share (in Dollars per share) $ (0.07) $ (0.01) $ (0.09) $ (0.07) $ (0.08) $ (0.15) $ (0.14) $ (0.09) $ (0.23) $ (0.46) $ (1.01)