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 ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Jul. 31, 2015
Apr. 30, 2015
Jan. 31, 2015
Oct. 31, 2014
Jul. 31, 2014
Apr. 30, 2014
Jan. 31, 2014
Oct. 31, 2013
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2013
Quarterly Financial Data [Abstract]                      
Total revenues $ 25,697 $ 23,986 $ 23,092 $ 24,824 $ 24,907 $ 23,978 $ 22,928 $ 24,134      
Gross profit 11,317 10,483 10,028 10,999 10,935 10,394 9,771 10,579      
(Loss) income before income taxes 8,523 (3,003) (4,206) (3,606) (3,162) (448) (3,570) (2,725) $ (2,292) $ (9,905) $ (18,949)
Net (loss) income $ 8,442 $ (2,907) $ (4,091) $ (3,729) $ (3,169) $ (455) $ (3,566) $ (2,787) $ (2,285) $ (9,977) $ (18,237)
Basic and diluted (loss) income per common share (in Dollars per share) $ 0.18 $ (0.06) $ (0.09) $ (0.08) $ (0.07) $ (0.01) $ (0.09) $ (0.07) $ (0.05) $ (0.23) $ (0.46)