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Segment Information - Operations and Identifiable Assets (Details)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2023
USD ($)
customer
Dec. 31, 2022
USD ($)
customer
Dec. 31, 2023
USD ($)
customer
segment
Dec. 31, 2022
USD ($)
customer
Jun. 30, 2023
USD ($)
customer
Segment Information          
Number of identifiable industry segments | segment     3    
Total revenues $ 373,235 $ 295,597 $ 652,445 $ 563,668  
Income (loss) from operations 52,321 $ 25,491 74,880 $ 43,791  
Segments assets $ 1,726,477   $ 1,726,477   $ 1,555,686
Revenues          
Segment Information          
Number of major customers | customer   0   0  
Accounts receivable          
Segment Information          
Number of major customers | customer         0
One customer. | Accounts receivable | Customer          
Segment Information          
Concentration (as a percent)         10.00%
International customers | Revenues | Customer          
Segment Information          
Concentration (as a percent)   10.00%   10.00%  
Security division | One customer.          
Segment Information          
Number of major customers | customer 1   1    
Security division | One customer. | Revenues | Customer          
Segment Information          
Concentration (as a percent) 18.00%   14.00%    
Security division | One customer. | Accounts receivable          
Segment Information          
Number of major customers | customer     1    
Security division | One customer. | Accounts receivable | Customer          
Segment Information          
Concentration (as a percent)     12.00%    
Healthcare division          
Segment Information          
Total revenues $ 41,850 $ 43,520 $ 79,637 $ 87,083  
Income (loss) from operations 429 1,404 593 3,032  
Segments assets 302,479   302,479   $ 245,856
Operating segments | Security division          
Segment Information          
Total revenues 249,975 167,444 414,604 312,436  
Income (loss) from operations 51,856 21,593 72,465 36,518  
Segments assets 1,118,783   1,118,783   948,126
Operating segments | Optoelectronics And Manufacturing Division          
Segment Information          
Total revenues 98,097 98,709 194,225 192,625  
Income (loss) from operations 11,621 12,212 23,058 23,470  
Segments assets 243,887   243,887   310,930
Corporate          
Segment Information          
Income (loss) from operations (11,183) (9,276) (21,099) (19,424)  
Segments assets 108,321   108,321   94,678
Intersegment revenue elimination          
Segment Information          
Total revenues (16,687) (14,076) (36,021) (28,476)  
Income (loss) from operations (402) $ (442) (137) $ 195  
Segments assets $ (46,993)   $ (46,993)   $ (43,904)