(LOSS) EARNINGS PER SHARE (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
(LOSS) EARNINGS PER SHARE [Abstract]
Number of shares of outstanding convertible preferred stock eligible to be converted into common stock (in shares)	1,623,000				1,623,000
Percentage of outstanding convertible preferred stock eligible to be converted into common stock	100.00%				100.00%
Numerator [Abstract]
Net (loss) income	$ (586,000)	$ 55,000	$ 304,000	$ 6,000	$ (531,000)	$ 310,000
Preferred dividend	125,000		125,000		250,000	250,000
Net (loss) income available to common stockholders	$ (711,000)		$ 179,000		$ (781,000)	$ 60,000
Denominator [Abstract]
Basic weighted average number of common shares outstanding (in shares)	3,617,000		3,594,000		3,617,000	3,594,000
Effect of dilutive stock options (in shares)	0		179,000		0	179,000
Diluted weighted average number of common shares outstanding (in shares)	3,617,000		3,773,000		3,617,000	3,773,000
Basic earnings per common share (in dollars per share)	$ (0.20)		$ 0.05		$ (0.22)	$ 0.02
Diluted earnings per common share (in dollars per share)	$ (0.20)		$ 0.05		$ (0.22)	$ 0.02