Note 7 - Marketable Securities - Available-for-sale Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Marketable securities	$ 125,568	$ 143,117
Corporate Bonds [Member]
Available For Sale Securities Debt Maturities Within One Year Amortized Cost	50,425	61,113
Available-for-sale - matures within one year, Gross unrealized gains	118	41
Available-for-sale - matures within one year, Gross unrealized losses	(424)	(146)
Available-for-sale- matures within one year, Fair Value	50,119	61,008
Available-for-sale - matures after one year through five years, amortized cost	75,632	83,491
Available-for-sale - matures after one year through five years, Gross unrealized gains	322	221
Available for Sale Matures after One Year Through Five Years, Gross Unrealized Loss	(505)	(1,603)
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value	75,449	82,109
Debt Securities, Available-for-Sale, Amortized Cost	126,057	144,604
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	440	262
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(929)	(1,749)
Marketable securities	$ 125,568	$ 143,117

Available for sale matures after one year through five years gross unrealized gains.

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Available for sale matures after one year through five years gross unrealized loss.

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Available for sale matures within one year, gross unrealized gains.

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Available For Sale Matures Within One Year Gross Unrealized Loss

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
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-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

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Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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