LEASES - Operating and Finance leases (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2021 USD ($) facility lease	Sep. 30, 2020 USD ($)
LEASES
Amortization of operating lease	$ 1,192	$ 906
Amortization of right-of-use asset expense	103	145
Financing lease interest expense	$ 184	283
Number of operating leases containing variable lease component | lease	1
Number of components of the Company's revenue which triggers the variable lease component of one operating lease | lease	1
Number of facilities the Company serves as a lessor to a lessee | facility	1
Variable payments for lease	$ 176	126
Sublease income	$ 657	$ 636