FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]

Assets and liabilities measured at fair value on a recurring basis are summarized below:

	Fair value measurement at reporting date using
Description	Total June 30, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Time deposits	$	50,000		-	$	50,000	$	-
Money market mutual funds		1,747,000		1,747,000		-		-
US T-Bills		16,884,000		16,884,000
Marketable securities:
Corporate debt securities		534,000		-		534,000		-
Marketable equity securities		4,657,000		4,657,000		-		-
Total assets	$	23,872,000	$	23,288,000	$	584,000	$	-

	Fair value measurement at reporting date using
Description	Total December 31, 2017		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Time deposits	$	352,000	$	-	$	352,000	$	-
Money market mutual funds		1,633,000		1,633,000		-		-
US T-Bills		2,935,000		2,935,000		-
Marketable securities:
Corporate debt securities		517,000		-		517,000		-
Marketable equity securities		4,033,000		4,033,000		-		-
Total assets	$	9,470,000	$	8,601,000	$	869,000	$	-