LEASES - Future Minimum Lease Payments (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Operating leases, estimated future minimum lease payments
2021	$ 241,000
2022	48,000
2023	35,000
2024	17,000
Total lease obligations	341,000
Less: Amount representing interest	(24,000)
Present value of net minimum lease obligations	317,000		$ 750,000
Less, current portion	(225,000)	$ (209,000)
Long term portion	92,000	317,000
Finance leases, estimated future minimum lease payments
2021	61,000
2022	49,000
2023	38,000
2024	28,000
2025	13,000
Total lease obligations	189,000
Less: Amount representing interest	(25,000)
Finance Lease, Liability, Total	164,000
Less, current portion	(48,000)	(52,000)
Long term portion	116,000	119,000
2021	302,000
2022	97,000
2023	73,000
2024	45,000
2025	13,000
Total lease obligations	530,000
Less: Amount representing interest	(49,000)
Total lease liabilities	481,000	$ 697,000
Less, current portion	(273,000)
Long term portion	$ 208,000