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Inventories (Tables)
12 Months Ended
Jul. 31, 2021
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of the following at July 31, 2021 and 2020:
 20212020
Raw materials and components$62,249,000 59,175,000 
Work-in-process and finished goods38,338,000 42,203,000 
Total inventories100,587,000 101,378,000 
Less reserve for excess and obsolete inventories20,229,000 19,076,000 
Inventories, net$80,358,000 82,302,000