11. STOCK-BASED COMPENSATION - Schedule of Restricted Stock Summary (Details)	6 Months Ended	12 Months Ended
Mar. 31, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares
Class of Stock [Line Items]
Number of Shares Outstanding at Beginning \| shares	998,601	10,995
Weighted Average Grant-Date Fair Value Per Share Outstanding at Beginning	$ 26.39	$ 30.72
Stock Issued During Period, Shares, Restricted Stock Award, Gross \| shares	1,106,250
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 0
Restricted stock vested during period \| shares	77,885
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited \| shares	(40,759)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 40.91
Number of Shares Outstanding at Ending \| shares	998,601	10,995
Weighted Average Exercise, Ending Balance	$ 26.39	$ 30.72
Restricted [Member]
Class of Stock [Line Items]
Weighted Average Grant-Date Fair Value Per Share Outstanding at Beginning	$ 14.15	$ 11.59
Aggregate Intrinsic Value Outstanding at Beginning \| $	$ 12,352,694	$ 84,839
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 14.68
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Intrinsic Value, Amount Per Share \| $	$ 13,684,313
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value, Amount Per Share	$ 20.15
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested \| $	$ 1,569,280
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 20.48
Share based compensation arrangement by share based payment award \| $	$ 458,729
Weighted Average Exercise, Ending Balance	$ 14.15	$ 11.59
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding \| $	$ 12,352,694	$ 84,839

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