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Long Term Debt - Texas Capital Bank Revolver Loan - Additional Information (Details) - Texas Capital Bank Revolver Loan - USD ($)
6 Months Ended
Mar. 31, 2021
Nov. 03, 2016
Debt Instrument [Line Items]    
Credit line maximum   $ 12,000,000
Credit line expiration period 5 years  
Debt periodic frequency monthly  
Credit line maturity date Nov. 03, 2023