Note K - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

	Balance as of			Fair v alue m easurements
	June 3 0 , 201 8			Level 1		Level 2			Level 3
Description	(Unaudited)
Assets :
Cash equivalents :
Money market mutual funds	$	1,019		$	1,019		-			-
Short-term marketable securities:
Corporate debt securities	$	23,647			-	$	23,647			-
U.S. GSE securities	$	1,695				$	1,695
Long-term marketable securities:
U.S. GSE securities	$	19,891			-	$	19,891			-
Corporate debt securities	$	51,658			-	$	51,658			-
Liabilities :
Derivative liabilities :	$	(20	)		-	$	(20	)		-

	Balance as of		Fair value measurements
Description	December 31, 201 7		Level 1		Level 2		Level 3
	(Audited)
Assets
Cash equivalents
Money market mutual funds	$	2,998	$	2,998		-		-
Short-term marketable securities
U.S. GSE securities	$	786		-	$	786		-
Corporate debt securities	$	18,430		-	$	18,430		-
Long-term marketable securities
U.S. GSE securities	$	21,258		-	$	21,258		-
Corporate debt securities	$	56,398		-	$	56,398		-