SUMMARIZED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Summarized quarterly financial data

	2017								2016
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Revenue	$	2,380,000		2,689,000		3,089,000		4,953,000	$	2,078,000			2,462,000			2,223,000			3,049,000
Net income (loss)	$	59,000		365,000		1,001,000		732,000	$	(501,000	)		(728,000	)		(1,140,000	)		(3,209,000	)(a)
Net income (loss) per share:
Continuing operations	$	.002		.01		.04		.02	$	(.02	)		(.03	)		(.05	)		(.15	)
Discontinued operations	$	—		—		—		—	$	—			—			—			—