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Supplemental Cash Flow Data (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 05, 2021
Aug. 31, 2020
Apr. 30, 2020
May 31, 2020
Aug. 31, 2021
Aug. 31, 2020
Aug. 31, 2019
Sep. 01, 2020
Supplemental Cash Flow Data                
Income taxes paid         $ 17,074 $ 11,186 $ 11,714  
Interest paid         245 230 728  
Common stock received for payment of stock option exercises         206 123 119  
Property, plant and equipment additions included in accounts payable         256 92 67  
Acquisition of certain assets                
Goodwill   $ 82,402     97,866 82,402 81,986  
Payments for acquisitions         (31,238)      
Sale of business                
Gain on sale of real estate           (2,551)    
Randolph, MA - Property                
Sale of business                
Asset held for sale   (14)       (14)    
Gain on sale of real estate   (1,791)       (1,791)    
Cash proceeds   1,805       1,805    
Pawtucket, RI manufacturing facility                
Sale of business                
Asset held for sale   $ (1,050)       (1,050)    
Gain on sale of real estate     $ (760)     (760)    
Cash proceeds     $ 1,810 $ 1,810   $ 1,810    
Fiber Optic Cable Components Product Line                
Sale of business                
Due from sale of business             (400)  
Cash proceeds             $ 400  
Emerging Technologies                
Acquisition of certain assets                
Accounts receivable         481      
Inventory         919      
Prepaid expenses and other current assets         8      
Property, plant and equipment         7      
Goodwill $ 2,451       2,451      
Intangible assets         6,650      
Accounts payable and accrued expenses         (519)      
Other liabilities (due to sellers) (1,000)       (1,000)      
Payments for acquisitions $ (8,997)       (8,997)      
ABchime                
Acquisition of certain assets                
Accounts receivable         697      
Inventory         239      
Prepaid expenses and other current assets         696      
Property, plant and equipment         245      
Goodwill         13,055     $ 13,055
Intangible assets         12,055      
Operating lease right-of-use asset         473      
Deferred tax liability         (3,387)      
Accounts payable and accrued expenses         (431)      
Operating lease liabilities (inclusive of short- and long-term)         (473)      
Other liabilities (due to sellers)         (928)      
Payments for acquisitions         $ (22,241)