LEASES - Maturities of operating and finance lease (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Maturities of operating lease liabilities
2021 (remainder of fiscal year)	$ 731
2022	1,029
2023	1,063
2024	1,062
2025	609
Thereafter	377
Total minimum future lease payments	4,871
Less interest	(564)
Total operating lease liabilities	4,307	$ 4,908
2021 (remainder of fiscal year)	4,821
2022	19
2023	13
2024	13
2025	5
Total minimum future lease payments	4,871
Less interest	(138)
Total finance lease liabilities	$ 4,733	$ 4,633

Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

No definition available.