LONG-TERM DEBT (Department of Economic and Community Development) (Details) - USD ($)		12 Months Ended
	Jan. 08, 2018	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Deferred grant revenue		$ 100,000	$ 100,000
Total debt		1,010,000	519,000
Revenue, net of contractual allowances and adjustments		7,431,000	4,095,000
Department of Economic and Community Development (DECD)
Debt Instrument [Line Items]
Gross proceeds from grant received and loan	$ 400,000
Proceeds from grant	$ 100,000
Debt instrument, term	10 years
Debt instrument, maturity date	Dec. 31, 2027
Interest rate (as a percent)	3.25%
Total debt		233,000	249,000
Term loan | Department of Economic and Community Development (DECD)
Debt Instrument [Line Items]
Proceeds from long-term debt	$ 300,000
Debt issuance costs, net	$ 31,000	22,000	24,000
Amortization of debt issuance cost		2,000	$ 3,000
2020		3,000
2021		3,000
2022		3,000
2023		3,000
2024		$ 3,000