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Segment Information - Operations and Identifiable Assets (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
customer
segment
Sep. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
customer
Segment Information      
Number of identifiable industry segments | segment 3    
Total revenues $ 344,007 $ 279,210  
Income (loss) from operations 30,328 $ 22,559  
Segments assets $ 2,113,514   $ 1,936,008
Net revenues      
Segment Information      
Number of major customers | customer 1    
Accounts receivable,net      
Segment Information      
Number of major customers | customer     2
No customer | Accounts receivable,net | Customer      
Segment Information      
Concentration (as a percent) 14.00%   39.00%
Security division | Accounts receivable,net      
Segment Information      
Number of major customers | customer 10    
Security division | One customer. | Net revenues | Customer      
Segment Information      
Concentration (as a percent)   10.00%  
Security division | One customer. | Accounts receivable,net | Customer      
Segment Information      
Concentration (as a percent) 37.00%    
Security division | Two Customer | Accounts receivable,net | Customer      
Segment Information      
Concentration (as a percent) 12.00%    
Healthcare division      
Segment Information      
Total revenues $ 37,102 $ 37,787  
Income (loss) from operations 800 164  
Segments assets 255,639   $ 255,093
Operating segments | Security division      
Segment Information      
Total revenues 224,314 164,629  
Income (loss) from operations 28,856 20,609  
Segments assets 1,514,264   1,333,259
Operating segments | Optoelectronics and Manufacturing Division      
Segment Information      
Total revenues 97,795 96,128  
Income (loss) from operations 10,609 11,437  
Segments assets 289,302   288,629
Corporate      
Segment Information      
Income (loss) from operations (9,510) (9,916)  
Segments assets 100,958   106,078
Intersegment revenue Elimination      
Segment Information      
Total revenues (15,204) (19,334)  
Income (loss) from operations (427) $ 265  
Segments assets $ (46,649)   $ (47,051)