DEFINED BENEFIT PLAN - Components of net periodic benefit costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Components of net periodic benefit expense:
Interest cost	$ 207	$ 0	$ 344	$ 0
Expected return on assets	(352)	0	(681)	0
Amortization of prior loss	177	0	454	0
Net periodic benefit cost	$ 32	$ 0	$ 117	$ 0