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Note 8 - Fair Value Measurements - Level 1 Assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Balance as of March 31, 2023	$ 25,649
Fair Value, Inputs, Level 1 [Member]
Balance as of December 31, 2022	0
Balance as of March 31, 2023	25,649
Fair Value, Inputs, Level 1 [Member] | Certificates of Deposit [Member]
Investments in certificates of deposit	$ 25,649

X

- Definition

Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

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- Details

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- Details

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