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Fair Value Measurements - Fair Value Measurement of Acquired Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Operating lease, right-of-use asset $ 2,419 $ 3,110
Evertel Technologies, LLC [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Intangible assets from Evertel acquisition   2,550
Intangible assets, gain (loss)   0
Goodwill from software reporting unit   2,923
Gain (loss) in goodwill   0
Operating lease, right-of-use asset 67  
Operating lease right of use asset gain (loss) 0  
Evertel Technologies, LLC [Member] | Fair Value, Inputs, Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Intangible assets from Evertel acquisition   0
Goodwill from software reporting unit   0
Operating lease, right-of-use asset 0  
Evertel Technologies, LLC [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Intangible assets from Evertel acquisition   0
Goodwill from software reporting unit   0
Operating lease, right-of-use asset 0  
Evertel Technologies, LLC [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Intangible assets from Evertel acquisition   2,550
Goodwill from software reporting unit   $ 2,923
Operating lease, right-of-use asset $ 67