SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail Textuals 3) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue	$ 4,058,000	$ 5,401,000	$ 3,760,000	$ 2,911,000	$ 3,060,000	$ 5,707,000	$ 2,542,000	$ 4,156,000	$ 16,131,000	$ 15,465,000
Costs and expenses									15,819,000	15,940,000
Provision for income taxes									(8,000)	543,000
Stockholders' equity	61,897,000				60,534,000				61,897,000	60,534,000	$ 59,004,000
Deferred tax assets	5,171,000				5,071,000				5,171,000	5,071,000
Accrued expenses	$ 1,319,000				1,401,000				$ 1,319,000	1,401,000
Accounting Standards Update 2014-09 | New Revenue Standard Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue										(800,000)
Increase in unbilled receivables					1,400,000					1,400,000
Costs and expenses										(100,000)
Provision for income taxes										(400,000)
Stockholders' equity					900,000					900,000
Deferred tax assets					(300,000)					(300,000)
Accrued expenses					200,000					200,000
Increase in stockholders' equity due to adoption of standard					1,200,000					1,200,000
Accounting Standards Update 2014-09 | DSL royalty contracts | New Revenue Standard Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue										(17,000)
Accounting Standards Update 2014-09 | Minimum license/royalty payment contract | New Revenue Standard Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue										(800,000)
Increase in unbilled receivables					1,400,000					1,400,000
Accounting Standards Update 2014-09 | Sales commissions and other third-party acquisition costs | New Revenue Standard Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses										(114,000)
ASU 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax asset offsetting adjustment to retained earnings related to excess stock compensation deductions					$ 4,800,000					$ 4,800,000