Note L - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Balance as of		Fair value measurements
	September 30, 2020		Level 1		Level 2		Level 3
Description	(Unaudited)
Assets:
Cash equivalents:
Money market mutual funds	$	4,559	$	4,559		-		-
Short-term marketable securities:
U.S. GSE securities	$	426			$	426
Corporate debt securities	$	28,842		-	$	28,842		-
Long-term marketable securities:
U.S. GSE securities	$	735		-	$	735		-
Corporate debt securities	$	54,820		-	$	54,820		-

	Balance as of		Fair value measurements
Description	December 31, 2019		Level 1		Level 2		Level 3
	(Audited)
Assets
Cash equivalents
Money market mutual funds	$	11,635	$	11,635		-		-
Short-term marketable securities
U.S. GSE securities	$	752		-	$	752		-
Corporate debt securities	$	23,322		-	$	23,322		-
Long-term marketable securities
U.S. GSE securities	$	3,710		-	$	3,710		-
Corporate debt securities	$	59,174		-	$	59,174		-