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Note 15 - Asset Acquisitions (Details Textual) - USD ($) $ in Thousands				3 Months Ended		12 Months Ended
	Jan. 24, 2025	Jan. 24, 2025	Jan. 14, 2025	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Stock Issued During Period, Value, Purchase of Assets					$ 113
Acquired In-Process Research and Development Expense				$ 0	119
Share-Based Payment Arrangement, Expense				$ 64	$ 91
PeriKard, LLC [Member]
Asset Acquisition, Percentage of Membership Interest Acquired	100.00%	100.00%
Stock Issued During Period, Shares, Purchase of Assets (in shares)			14,473
Stock Issued During Period, Value, Purchase of Assets	$ 113
Royalty Percentage		10.00%
Royalty, Term (Year)	5 years	5 years
Acquired In-Process Research and Development Expense						$ 119	$ 0
Share-Based Payment Arrangement, Expense						113
Direct Transaction Costs						$ 6
IPR&D Asset [Member]
Stock Issued During Period, Shares, Purchase of Assets (in shares)						52,631
Stock Issued During Period, Value, Purchase of Assets						$ 300
Direct Transaction Costs						300
Debt Instrument, Face Amount						1,300
Asset Acquisition, Consideration Transferred, Related Cost						1,900
Asset Acquisition, Consideration Transferred, Transaction Cost						300
IPR&D Asset [Member] \| Secured Debt [Member]
Convertible Debt						$ 1,300