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Note 7 - Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

		March 31, 2024 (Unaudited)
		Amortized cost				Gross unrealized gains				Gross unrealized losses				Fair value
Available-for-sale - matures within one year:
Corporate bonds		$	49,434			$	45			$	(743	)		$	48,736
Available-for-sale - matures after one year through three years:
Corporate bonds			80,935				127				(2,928	)			78,134
Total
		$	130,369			$	172			$	(3,671	)		$	126,870

		December 31, 2023
		Amortized cost				Gross unrealized gains				Gross unrealized losses				Fair value
Available-for-sale - matures within one year:
Corporate bonds		$	27,690			$	4			$	(243	)		$	27,451
Available-for-sale - matures after one year through three years:
Corporate bonds			108,700				278				(3,734	)			105,244
Total		$	136,390			$	282			$	(3,977	)		$	132,695

Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]

		Less than 12 months								12 months or greater
		Fair value				Gross unrealized loss				Fair value				Gross unrealized loss
As of March 31, 2024 (unaudited)		$	23,123			$	(147	)		$	76,036			$	(3,524	)
As of December 31, 2023		$	18,193			$	(49	)		$	86,643			$	(3,928	)

Schedule of Realized Gain (Loss) [Table Text Block]

		Three months ended March 31,
		2024				2023
		(unaudited)				(unaudited)
Gross realized gains from sale of available-for-sale marketable securities		$	9			$	92
Gross realized losses from sale of available-for-sale marketable securities		$	(5	)		$	—

X

- Definition

Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
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-Name Accounting Standards Codification
-Section 55
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-Topic 320
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-Topic 326
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-Paragraph 4
-Publisher FASB
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+ References

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