Note L - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

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

	Balance as of		Fair value measurements
	September 30, 2019		Level 1		Level 2		Level 3
Description	(Unaudited)
Assets :
Cash equivalents :
Money market mutual funds	$	8,578	$	8,578		-		-
Short-term marketable securities:
U.S. GSE securities	$	748			$	748
Corporate debt securities	$	21,368		-	$	21,368		-
Long-term marketable securities:
U.S. GSE securities	$	15,037		-	$	15,037		-
Corporate debt securities	$	50,644		-	$	50,644		-

	Balance as of		Fair value measurements
Description	December 31, 2018		Level 1		Level 2		Level 3
	(Audited)
Assets
Cash equivalents
Money market mutual funds	$	773	$	773		-		-
Short-term marketable securities
U.S. GSE securities	$	1,785		-	$	1,785		-
Corporate debt securities	$	25,579		-	$	25,579		-
Long-term marketable securities
U.S. GSE securities	$	19,512		-	$	19,512		-
Corporate debt securities	$	50,896		-	$	50,896		-
Derivative liabilities	$	3		-	$	3		-