LEASES - Maturities of operating and finance lease (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Maturities of operating lease liabilities
2021 (remainder of fiscal year)	$ 496
2022	2,001
2023	2,022
2024	1,998
2025	1,494
Thereafter	1,800
Total minimum future lease payments	9,811
Less interest	(1,011)
Total operating lease liabilities	8,800	$ 4,210
Maturities of finance lease liabilities
2021 (remainder of fiscal year)	6
2022	24
2023	18
2024	18
2025	7
Thereafter	1
Total minimum future lease payments	74
Less interest	(6)
Total finance lease liabilities	$ 68	$ 4,772