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Note 6 - Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

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

		March 31, 2025 (Unaudited)
		Amortized cost				Gross unrealized gains				Gross unrealized losses				Fair value
Available-for-sale - matures within one year:
Corporate bonds		$	39,596			$	51			$	(310	)		$	39,337
Available-for-sale - matures after one year through three years:
Corporate bonds			98,714				335				(905	)			98,144
Total
		$	138,310			$	386			$	(1,215	)		$	137,481

		December 31, 2024
		Amortized cost				Gross unrealized gains				Gross unrealized losses				Fair value
Available-for-sale - matures within one year:
Corporate bonds		$	61,113			$	41			$	(146	)		$	61,008
Available-for-sale - matures after one year through three years:
Corporate bonds			83,491				221				(1,603	)			82,109
Total		$	144,604			$	262			$	(1,749	)		$	143,117

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, 2025 (unaudited)		$	24,160			$	(97	)		$	37,121			$	(1,118	)
As of December 31, 2024		$	28,762			$	(160	)		$	61,996			$	(1,589	)

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

		Three months ended March 31,
		2025				2024
		(unaudited)				(unaudited)
Gross realized gains from sale of available-for-sale marketable securities		$	—			$	9
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
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479081/326-30-55-8

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-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-6

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-4

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- Definition

Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales.

+ References

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-Section 50
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