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SHARE BASED COMPENSATION - Summary of Stock Options (Details) - $ / shares
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Options      
Beginning balance (in shares) 160,000 220,000 230,000
Exercised (in shares) 0 (60,000.00) (10,000.00)
Ending balance (in shares) 160,000 160,000 220,000
Weighted Average Exercise Price      
Beginning balance (in dollars per share) $ 82.36 $ 73.96 $ 73.51
Exercised (in dollars per share)   52.83 52.83
Ending balance (in dollars per share) 82.36 82.36 73.96
Weighted Average
Grant Date Fair Value      
Beginning balance (in dollars per share) 5.32 4.82 4.79
Exercised (in dollars per share)   3.55 3.55
Ending balance (in dollars per share) $ 5.32 $ 5.32 $ 4.82