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12. STOCK WARRANTS - Schedule of Warrant Summary (Details) - $ / shares
9 Months Ended
Jun. 30, 2021
Sep. 30, 2020
Stock Warrants    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number 615,704 1,299,215
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 30.71 $ 21.82
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value  
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures and Expirations 432,721  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value $ 15.00  
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures  
[custom:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCanceledWeightedAverageExercisePrice]  
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised 250,790  
[custom:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedWeightedAverageExercisePrice] $ 11.77