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Property, Plant, and Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Property, Plant and Equipment [Line Items]      
Land Buildings And Improvements Gross $ 32,610 $ 37,263  
Machinery and Equipment, Gross 76,603 84,258  
Transportation Equipment Gross 41,075 40,606  
Office Equipment and Capitalized Computer Software Gross 34,154 38,178  
Finance Lease Gross 33 0  
Construction in progress 4,948 84  
Property, Plant and Equipment, Gross 189,423 200,389  
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment (145,925) (152,844)  
Property, plant and equipment, net 43,498 47,545  
Long-Lived Assets 62,648 69,344 $ 75,936
Proceeds from asset sales (Note 3) 6,049 6,466 39,018
Gain (Loss) on Disposition of Property Plant Equipment 4,923 2,841 33,114
Depreciation 9,600 12,000 13,400
Industrial Cleaning [Member]      
Property, Plant and Equipment [Line Items]      
Gain (Loss) on Disposition of Property Plant Equipment   2,900  
Proceeds from Divestiture of Businesses   6,300  
Holdback receivable   400  
Orange California Facility      
Property, Plant and Equipment [Line Items]      
Proceeds from asset sales (Note 3)     37,400
Gain (Loss) on Disposition of Property Plant Equipment     32,400
UNITED STATES      
Property, Plant and Equipment [Line Items]      
Long-Lived Assets 57,520 63,174 69,932
CANADA      
Property, Plant and Equipment [Line Items]      
Long-Lived Assets 1,368 1,957 1,397
International [Member]      
Property, Plant and Equipment [Line Items]      
Long-Lived Assets 3,760 $ 4,213 $ 4,607
Bakersfield Facility Purchase      
Property, Plant and Equipment [Line Items]      
Payments to Acquire Buildings 4,100    
Catoosa Facility Disposal      
Property, Plant and Equipment [Line Items]      
Proceeds from asset sales (Note 3) 2,700    
Gain (Loss) on Disposition of Property Plant Equipment 2,000    
Burlington Office [Member]      
Property, Plant and Equipment [Line Items]      
Proceeds from asset sales (Note 3) 2,700    
Gain (Loss) on Disposition of Property Plant Equipment $ 2,500