STOCK-BASED COMPENSATION - Restricted Shares and Restricted Stock Units Activity (Details) shares in Thousands	12 Months Ended
	Sep. 30, 2023 $ / shares shares
Restricted Shares (in thousands)
Restricted Shares or Stock Units
Beginning balance (in shares) | shares	149
Granted (in shares) | shares	16
Vested (in shares) | shares	(107)
Forfeited (in shares) | shares	(17)
Ending balance (in shares) | shares	39
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 16.09
Granted (in dollars per share) | $ / shares	6.56
Vested (in dollars per share) | $ / shares	11.20
Forfeited (in dollars per share) | $ / shares	17.60
Ending balance (in dollars per share) | $ / shares	$ 25.03
Restricted Stock Units (in thousands)
Restricted Shares or Stock Units
Beginning balance (in shares) | shares	551
Granted (in shares) | shares	546
Vested (in shares) | shares	(137)
Forfeited (in shares) | shares	(23)
Ending balance (in shares) | shares	936
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 23.82
Granted (in dollars per share) | $ / shares	7.16
Vested (in dollars per share) | $ / shares	24.28
Forfeited (in dollars per share) | $ / shares	12.67
Ending balance (in dollars per share) | $ / shares	$ 14.29