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Property, Plant and Equipment
12 Months Ended
Jul. 31, 2023
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment consist of the following at July 31, 2023 and 2022:
 20232022
Machinery and equipment$193,832,000 186,935,000 
Leasehold improvements9,680,000 14,260,000 
 203,512,000 201,195,000 
Less accumulated depreciation and amortization150,483,000 150,832,000 
Property, plant and equipment, net$53,029,000 50,363,000 

Depreciation and amortization expense on property, plant and equipment amounted to $11,917,000, $10,303,000 and $9,343,000 for the fiscal years ended July 31, 2023, 2022 and 2021, respectively.