DEFINED BENEFIT PLAN - Components of net periodic benefit costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2022	Mar. 31, 2022
Components of net periodic benefit expense:
Interest cost	$ 79	$ 137
Expected return on assets	(220)	(329)
Amortization of prior loss	116	277
Net periodic benefit cost	$ (25)	$ 85