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Segment Information and Major Customers Summary of Operating Results by Segment (Details)
$ in Thousands
 12 Months Ended
Sep. 30, 2025
USD ($)
segment
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Segment Reporting Information [Line Items]      
Revenue $ 430,221 $ 424,046 $ 444,849
Gross profit 270,677 249,906 252,203
Other segment items 339,956 342,896 362,778
Operating income (loss) 56,290 48,089 50,095
Depreciation and amortization $ 33,975 33,061 31,976
Number of operating segments | segment 2    
Number of reportable segments | segment 2    
IoT Products & Services      
Segment Reporting Information [Line Items]      
Revenue $ 317,883 324,444 345,680
Other segment items 258,803 265,516 281,979
Operating income (loss) 46,918 46,482 51,157
Depreciation and amortization 12,162 12,446 12,544
IoT Solutions      
Segment Reporting Information [Line Items]      
Revenue 112,338 99,602 99,169
Other segment items 81,153 77,380 80,799
Operating income (loss) 9,372 1,607 (1,062)
Depreciation and amortization $ 21,813 $ 20,615 $ 19,432