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Note 6 - Marketable Securities

9 Months Ended

Sep. 30, 2021

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

NOTE 6: MARKETABLE SECURITIES

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

	September 30, 2021 (Unaudited)
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
Available-for-sale - matures within one year:
Corporate bonds	$	5,410	$	25	$	—		$	5,435

Available-for-sale - matures after one year through five years:
Corporate bonds		68,661		466		(413	)		68,714
Total
	$	74,071	$	491	$	(413	)	$	74,149

	December 31, 2020
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
Available-for-sale - matures within one year:
Corporate bonds	$	12,667	$	49	$	(7	)	$	12,709

Available-for-sale - matures after one year through five years:
Corporate bonds		75,483		667		(105	)		76,045

Total	$	88,150	$	716	$	(112	)	$	88,754

The following table presents gross unrealized losses and fair values for those investments that were in an unrealized loss position as of September 30, 2021 and December 31, 2020, 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 September 30, 2021 (unaudited)	$	26,507	$	(339	)	$	4,102	$	(74	)
As of December 31, 2020	$	31,393	$	(91	)	$	7,381	$	(21	)

As of September 30, 2021, 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:

	Nine months ended September 30,						Three months ended September 30,
	2021 (unaudited)			2020 (unaudited)			2021 (unaudited)			2020 (unaudited)

Gross realized gains from sale of available-for-sale marketable securities	$	43		$	4		$	—		$	—
Gross realized losses from sale of available-for-sale marketable securities	$	(30	)	$	(19	)	$	(2	)	$	—