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SUMMARIZED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Summarized Quarterly Financial Data Details
Revenue	$ 4,953,000	$ 3,089,000	$ 2,689,000	$ 2,380,000	$ 3,049,000	$ 2,223,000	$ 2,462,000	$ 2,078,000	$ 13,110,000	$ 9,812,000
Net income (loss)	$ 732,000	$ 1,001,000	$ 365,000	$ 59,000	$ (3,209,000)	$ (1,140,000)	$ (728,000)	$ (501,000)	$ 2,157,000	$ (5,578,000)
Net income (loss) per share:
Basic	$ 0.02	$ 0.04	$ 0.01	$ 0.002	$ (.15)	$ (.05)	$ (.03)	$ (.02)
Diluted	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00

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