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, 2018
Apr. 30, 2018
Jan. 31, 2018
Oct. 31, 2017
Jul. 31, 2017
Apr. 30, 2017
Jan. 31, 2017
Oct. 31, 2016
Jul. 31, 2018
Jul. 31, 2017
Jul. 31, 2016
Quarterly Financial Data [Abstract]                      
Total revenues $ 24,455 $ 25,630 $ 26,952 $ 27,676 $ 28,171 $ 27,089 $ 26,260 $ 26,284      
Gross profit 9,665 11,073 11,345 12,245 12,386 12,173 11,688 12,079      
Income (loss) before income taxes (5,764) (3,016) (1,998) (640) 71 (39) (1,000) (1,454)      
Net loss $ (5,764) $ (3,016) $ (901) $ (640) $ 94 $ (71) $ (1,053) $ (1,474) $ (10,321) $ (2,504) $ 45,286
Basic and diluted loss per common share (in Dollars per share) $ (0.12) $ (0.06) $ (0.02) $ (0.01) $ 0.00 $ 0.00 $ (0.02) $ (0.03)