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Note 5 - Marketable Securities

6 Months Ended

Jun. 30, 2020

Cash, Cash Equivalents, and Marketable Securities [Text Block]

NOTE 5: MARKETABLE SECURITIES

The following is a summary of available-for-sale marketable securities:

	June 30, 2020 (Unaudited)
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
*Available-for-sale - matures within one year:*
Corporate bonds	$	16,772	$	62	$	(27	)	$	16,807
		16,772		62		(27	)		16,807
Available-for-sale - matures after one year through five years:
Corporate bonds		50,272		547		(333	)		50,486
		50,272		547		(333	)		50,486

Total	$	67,044	$	609	$	(360	)	$	67,293

	December 31, 2019
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
Available-for-sale - matures within one year:
Corporate bonds	$	18,224	$	16	$	(11	)	$	18,229
		18,224		16		(11	)		18,229
Available-for-sale - matures after one year through five years:
Corporate bonds		46,593		168		(123	)		46,638
		46,593		168		(123	)		46,638

Total	$	64,817	$	184	$	(134	)	$	64,867

The following table presents gross unrealized losses and fair values for those investments that were in an unrealized loss position as of June 30, 2020 and December 31, 2019, and the length of time that those investments have been in a continuous loss position:

	Less than 12 months					12 months or greater
	Fair value		Gross unrealized loss			Fair value		Gross unrealized loss
As of June 30, 2020 (unaudited)	$	28,365	$	(340	)	$	2,974	$	(20	)
As of December 31, 2019	$	22,852	$	(102	)	$	14,231	$	(32	)

As of June 30, 2020, the allowance for credit losses was not material.

The following table presents gross realized gains and losses from sale of available-for-sale marketable securities:

	Six months ended June 30,						Three months ended June 30,
	2020			2019			2020			2019
	(unaudited)			(unaudited)			(unaudited)			(unaudited)

Gross realized gains from sale of available-for-sale marketable securities	$	4		$	—		$	—		$	—
Gross realized losses from sale of available-for-sale marketable securities	$	(19	)	$	(35	)	$	(13	)	$	(11	)