XML 114 R77.htm IDEA: XBRL DOCUMENT v3.21.2
Note 14 - Stock-based Compensation - Performance Based Restricted Stock Units Assumptions (Details) - Performance-based Restriced Stock Units [Member]
12 Months Ended
Jul. 31, 2021
$ / shares
Grant Price (in dollars per share) $ 2.15
Grant Date Fair Value (in dollars per share) $ 2.48
Minimum [Member]  
Expected Risk Free Interest Rate 0.39%
Expected Volatility 78.03%
Expected Dividend Yield 0.00%
Expected Life in Years (Year) 3 years
Correlation 66.02%