RETIREMENT PLAN (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
RETIREMENT PLAN
Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan	50.00%
Maximum percentage of participant's contribution to the plan that the employer will contribute a matching contribution	6.00%
Contribution expense	$ 852	$ 538