Note 7 - Investments - Summary of Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Cash equivalents	$ 85,564	$ 110,745
Total assets at fair value	6,353
Total assets at fair value, unrealized gains	0
Total assets at fair value, unrealized losses	(1)
Total assets at fair value, fair value	6,352
Money Market Funds [Member]
Cash equivalents	1,367
Cash equivalents, unrealized gains	0
Cash equivalents, unrealized loss	0
Cash equivalents, fair value	1,367
US Government Corporations and Agencies Securities [Member]
Cash equivalents	4,986
Cash equivalents, unrealized gains	0
Cash equivalents, unrealized loss	(1)
Cash equivalents, fair value	$ 4,985

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on cash and cash equivalents.

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on cash and cash equivalents.

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on cash cash equivalents and short term investments.

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on cash cash equivalents and shorterm investments.

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Fair value portion of cash cash equivalents and short term investments.

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Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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