Note 6 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Corporate bonds	$ 106,142	$ 112,080
Investments in marketable equity securities	291	408
Foreign exchange contracts	360	119
Foreign exchange contracts		13
Fair Value, Inputs, Level 1 [Member]
Investments in marketable equity securities	291	408
Foreign exchange contracts	0	0
Foreign exchange contracts		0
Fair Value, Inputs, Level 2 [Member]
Investments in marketable equity securities	0	0
Foreign exchange contracts	360	119
Foreign exchange contracts		13
Fair Value, Inputs, Level 3 [Member]
Investments in marketable equity securities	0	0
Foreign exchange contracts	0	0
Foreign exchange contracts		0
Corporate Bonds [Member]
Corporate bonds	106,142	112,080
Corporate Bonds [Member] \| Fair Value, Inputs, Level 1 [Member]
Corporate bonds	0	0
Corporate Bonds [Member] \| Fair Value, Inputs, Level 2 [Member]
Corporate bonds	106,142	112,080
Corporate Bonds [Member] \| Fair Value, Inputs, Level 3 [Member]
Corporate bonds	$ 0	$ 0

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481830/320-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479130/326-30-45-1

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- Definition

Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

+ References

No definition available.

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- Definition

Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

+ References

No definition available.

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- Definition

Amount of investment in marketable security, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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