FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Jun. 30, 2021

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping

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, 2021		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market mutual funds	$	1,644,000	$	1,644,000	$	-	$	-
US T-bills		2,400,000		2,400,000		-		-
Marketable securities:
Corporate debt securities		697,000		-		697,000		-
Marketable equity securities		2,131,000		2,131,000		-		-
Total assets	$	6,872,000	$	6,175,000	$	697,000	$	-

	Fair value measurement at reporting date using
Description	Total December 31, 2020		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents:
Money market mutual funds	$	1,496,000	$	1,496,000	$	-	$	-
US T-bills		2,900,000		2,900,000		-		-
Marketable securities:
Corporate debt securities		613,000		-		613,000		-
Marketable equity securities		2,793,000		2,793,000		-		-
Total assets	$	7,802,000	$	7,189,000	$	613,000	$	-