INCOME (LOSS) PER SHARE - Loss per share basic and diluted (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator for basic and diluted (loss) income per common share:
Net (loss) income	$ (237,000)	$ (733,000)	$ (876,000)	$ 1,383,000
Denominator:
Denominator for basic (loss) income per share - weighted average common shares outstanding	3,195,000	3,181,000	3,183,000	3,177,000
Dilutive securities (1)	0	0	0	14,000
Denominator for diluted (loss) income per share - weighted average common shares outstanding	3,195,000	3,181,000	3,183,000	3,191,000