Note 3 - Fair Value of Financial Instruments (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2026

Dec. 31, 2025

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

		*March 31, 2026*
						*Quoted Prices*				*Significant*				*Significant*
						*in Active Markets*				*Observable*				*Unobservable*
						*for Identical Assets*				*Inputs*				*Inputs*
Category Class		*Total*				*(Level 1)*				*(Level 2)*				*(Level 3)*
Senior Secured Note (unpaid principal of $5,554)		$	2,157			$	-			$	-			$	2,157
Warrant Liability			4,699				-				-				4,699
Total		$	6,856			$	-			$	-			$	6,856

		*December 31, 2025*
						*Quoted Prices*				*Significant*				*Significant*
						*in Active Markets*				*Observable*				*Unobservable*
						*for Identical Assets*				*Inputs*				*Inputs*
Category Class		*Total*				*(Level 1)*				*(Level 2)*				*(Level 3)*
Senior Secured Note (unpaid principal of $15,000)		$	5,448			$	-			$	-			$	5,448
Warrant Liability			7,842				-				-				7,842
Total		$	13,290			$	-			$	-			$	13,290

		*December 31, 2025*
Category Class		*Total*				*Quoted Prices in Active Markets for Identical Assets (Level 1)*				*Significant Observable Inputs (Level 2)*				*Significant Unobservable Inputs (Level 3)*
Senior Secured Note (unpaid principal of $15,000)		$	5,448			$	-			$	-			$	5,448
Warrant Liabilities			7,842				-				-				7,842
Total		$	13,290			$	-			$	-			$	13,290

		December 31, 2024
Category Class		Total				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
Derivative Liability		$	6,759			$	-			$	-			$	6,759
Total		$	6,759			$	-			$	-			$	6,759

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

		Input Range
		Senior Secured Note					Warrant Liability
Significant Unobservable Inputs:
Discount rate		25%	-	26.4%				-
Term to expiration (in years)		2.74	-	3.0			4.74	-	5.0
Calibration discount			61.5%					-
No exercise window (in years)			-				0.19	-	0.21
Volatility			-				82.4%	-	90%
Risk-fee rate			-					3.65%

		Input Range
		December 31, 2025				December 31, 2024
Significant Unobservable Inputs:
Discount rate			18.7% - 25.0	%			18.7% - 25.0	%
Expected term (in years)			0.1 - 0.6				0.3 - 0.9
Probability scenarios:
Successful financing/IPO			27.6% - 98	%			27.6% - 63.9	%
Maturity			0%-20	%			16% - 65.5	%
Qualified Financing			0% - 3.4	%			0% - 3.4	%
Change of Control			0% - 3.4	%			0% - 3.4	%

		Input Range
		*December 31, 2025*
		*Senior Secured Note*				*Warrants*
Significant Unobservable Inputs:
Discount rate			25% - 25.1	%			-
Tern to expiration (in years)			2.99-3.0				4.99-5.0
Calibration discount			61.5	%			-
No exercise window (in years)			-				0.19-0.21
Volatility			-				82.4%-82.5	%
Risk-fee rate			-				3.65	%

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

		Senior Secured Note				Warrant Liability
Balance as of December 31, 2025		$	5,448			$	7,842
Change in fair value			145				(3,143	)
Cash payments on Notes Payable			(7,379	)			-
Loss on settlement of debt			6,020				-
Settlement of Notes Payable via common share issuance			(2,077	)			-
Balance as of March 31, 2026		$	2,157			$	4,699

		Embedded Derivative
Balance as of December 31, 2023		$	-
Initial fair value of derivative liabilities at issuance			2,468
Change in fair value			4,291
Balance as of December 31, 2024		$	6,759
Initial fair value of derivative liabilities at issuance			4,447
Change in fair value			7,040
Derecognition of derivative liability			(18,246	)
Balance as of December 31, 2025		$	-

		*Senior Secured Note*				*Warrant Liabilities*
Balance as of December 31, 2024		$	-			$	-
Initial fair value at issuance			5,437				8,870
Change in fair value			11				(1,028	)
Balance as of December 31, 2025		$	5,448			$	7,842