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Intangible Assets - Carrying Amount (Details) - USD ($)
$ in Thousands
6 Months Ended
Mar. 31, 2021
Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 8,150 $ 8,129
Accumulated Amortization (4,040) (3,371)
Total $ 4,110 4,758
Contract intangibles    
Finite-Lived Intangible Assets [Line Items]    
Useful Life (in years) 6 years  
Gross Carrying Amount $ 3,100 3,100
Accumulated Amortization (1,421) (1,162)
Total $ 1,679 1,938
Technology    
Finite-Lived Intangible Assets [Line Items]    
Useful Life (in years) 5 years  
Gross Carrying Amount $ 2,700 2,700
Accumulated Amortization (1,485) (1,215)
Total 1,215 1,485
Patent and trademarks    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 2,350 2,329
Accumulated Amortization (1,134) (994)
Total $ 1,216 $ 1,335
Minimum | Patent and trademarks    
Finite-Lived Intangible Assets [Line Items]    
Useful Life (in years) 7 years  
Maximum | Patent and trademarks    
Finite-Lived Intangible Assets [Line Items]    
Useful Life (in years) 10 years