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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair Value Measurement - Changes in Fair Value Measurements (Details)
9 Months Ended
Jun. 30, 2022
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning Balance $ 1,058,633
Change in fair value (164,708)
Ending Balance $ 893,925