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Accrued Expenses and Other Current Liabilities (Details) - USD ($)
Jul. 31, 2023
Jul. 31, 2022
Jul. 31, 2021
Accrued Liabilities, Current [Abstract]      
Accrued wages and benefits $ 21,994,000 $ 25,675,000  
Accrued warranty obligations 8,285,000 9,420,000 $ 17,600,000
Accrued contract costs 19,041,000 15,921,000  
Accrued commissions and royalties 4,659,000 5,697,000  
Accrued legal costs 688,000 2,514,000  
Other 12,323,000 13,435,000  
Accrued expenses and other current liabilities $ 66,990,000 $ 72,662,000