Note 3 - Cash and Cash Equivalents - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Money Market Funds [Member]
Amortized cost	$ 6,855	$ 2,211
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	6,855	2,211
Cash [Member]
Amortized cost	3,032	2,978
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	3,032	2,978
Cash and Cash Equivalents [Member]
Amortized cost	9,887	5,189
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	$ 9,887	$ 5,189

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

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+ Details

- Definition

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

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+ Details