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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Aug. 31, 2024
Aug. 31, 2023
Property, Plant and Equipment [Line Items]    
Total operating property, plant and equipment $ 232,415 $ 206,945
Accumulated depreciation (139,892) (130,923)
Total operating property, plant, and equipment, net 92,523 76,022
Machines 15,914 16,398
Barriers 32,286 34,398
Total property held for lease 48,200 50,796
Accumulated depreciation (27,908) (27,137)
Total property held for lease, net 20,292 23,659
Property, plant, and equipment, net 112,815 99,681
Land [Member]    
Property, Plant and Equipment [Line Items]    
Total operating property, plant and equipment 7,291 6,144
Building [Member]    
Property, Plant and Equipment [Line Items]    
Total operating property, plant and equipment 58,145 57,606
Machinery And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total operating property, plant and equipment 105,061 99,466
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Total operating property, plant and equipment 9,157 8,807
Computer Hardware and Software [Member]    
Property, Plant and Equipment [Line Items]    
Total operating property, plant and equipment 27,907 26,684
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Total operating property, plant and equipment $ 24,854 $ 8,238