XML 29 R50.htm IDEA: XBRL DOCUMENT v3.20.1
Related Party Transactions (Details) - USD ($)
3 Months Ended 9 Months Ended
Apr. 30, 2020
Apr. 30, 2019
Apr. 30, 2020
Apr. 30, 2019
Jul. 31, 2019
Related Party Transaction          
Current Fiscal Year End Date     --07-31    
Document Period End Date     Apr. 30, 2020    
Director          
Related Party Transaction          
Net sales to related party $ 103,000 $ 158,000 $ 263,000 $ 360,000  
Accounts receivable from related party 22,000   22,000   $ 10,000
Payments to related party 119,000 $ 140,000 182,000 $ 237,000  
Accounts payable to related party $ 0   $ 0