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Note 7 - Stockholders' Equity - Schedule of Stockholders Equity (Details) - ATM [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Sale of common stock (in shares) 184,725 81,274
Gross proceeds $ 225 $ 212
Associated issuance costs $ 40 $ 27