Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Summary of Stock Option Activity (Details)

v3.20.2
Stock-Based Compensation - Summary of Stock Option Activity (Details) - $ / shares
3 Months Ended 12 Months Ended
Jul. 31, 2020
Jul. 31, 2020
Jul. 31, 2019
Options Outstanding, Beginning Balance      
Options, Granted    
Options Outstanding, Ending Balance 1,442,856 1,442,856  
2011 Plan [Member]      
Options Outstanding, Beginning Balance   921,572 891,252
Options, Granted   1,463,982 302,749
Options, Exercised     (43,029)
Options, Forfeited/Cancelled   (942,698) (228,700)
Options, Expired     (700)
Options Outstanding, Ending Balance     921,572
Options vested and expected to vest 1,442,856 1,442,856  
Options Exercisable, Ending Balance 474,933 474,933  
Weighted Average Exercise Price, Outstanding Beginning Balance   $ 12.63 $ 15.00
Weighted Average Exercise Price, Granted   1.60 7.88
Weighted Average Exercise Price, Exercised   13.16
Weighted Average Exercise Price, Forfeited/Cancelled   12.31 15.32
Weighted Average Exercise Price, Expired     57.60
Weighted Average Exercise Price, Outstanding Ending Balance     $ 12.63
Weighted Average Exercise Price, Options vested and expected to vest $ 1.65 1.65  
Weighted Average Exercise Price, Exercisable , Ending Balance $ 1.72 $ 1.72