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Note 4 - Equity (Tables)

3 Months Ended

12 Months Ended

Jun. 30, 2025

Mar. 31, 2025

Notes Tables

Restricted Stock Expenses, General and Administrative [Table Text Block]

		Three Months Ended June 30,
		2025				2024
Recognized in general and administrative expense		$	—			$	33,250
Total		$	—			$	33,250

		Year ended March 31,
		2025				2024
Recognized in general and administrative expense		$	116,375			$	16,625
Total		$	116,375			$	16,625

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

						Grant Date
		Number of Shares				Fair Value Per Share
Outstanding, March 31, 2024			1,604			$	76.00
Granted			—			$	—
Vested			(1,604	)		$	76.00
Outstanding, March 31, 2025			—			$	—

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

						Weighted- Average
						Exercise Price
		Options				Per Share
Outstanding, March 31, 2025			243,483			$	32.72
Granted			5,000				1.85
Exercised			-				-
Forfeited/Cancelled			-				-
Expired			-				-
Outstanding, June 30, 2025			248,483			$	32.10
Exercisable, June 30, 2025			69,916			$	37.24

		Options				Weighted- Average Exercise Price Per Share				Weighted- Average Remaining Life (In Years)				Aggregate Intrinsic Value*
Outstanding, March 31, 2024			100,180			$	46.59				9.35			$	1,680,672
Granted			143,303				23.02				—				—
Exercised			—				—				—				—
Forfeited/Cancelled			—				—				—				—
Expired			—				—				—				—
Outstanding, March 31, 2025			243,483			$	32.72				8.92			$	-
Exercisable, March 31, 2025*			37,923			$	44.35				8.20			$	-

Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block]

						Weighted- Average
						Exercise Price
		Warrants				Per Share
Outstanding, March 31, 2025			1,934,874			$	5.8860
Granted			-				-
Exercised			(222,132	)			0.0010
Forfeited/Cancelled			(130	)			0.0010
Expired			-				-
Outstanding, June 30, 2025*			1,712,612			$	6.6498
Exercisable, June 30, 2025			1,712,612			$	6.6498

		Warrants				Weighted- Average Exercise Price Per Share				Weighted- Average Remaining Life (In Years)				Aggregate Intrinsic Value*
Outstanding and exercisable, March 31, 2024			287,231			$	1.64				4.80			$	17,072,147
Granted			2,542,677				4.31				—				—
Exercised**			(892,432	)			0.04				—				—
Forfeited/Cancelled			(2,602	)			0.20				—				—
Expired			—				—				—				—
Outstanding, March 31, 2025			1,934,874			$	5.89				4.09			$	532,060
Exercisable, March 31, 2025			1,842,889			$	5.67				4.06			$	532,060

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		Range
		2025				2024
Fair value of common stock on the measurement date (per share)			–			$2.00	to	5.00
Discount rate based on the daily yield curve rates for U.S. Treasury obligations			–			4.04%	to	4.54%
Expected life (in years)			–			3	to	5
Expected volatility based on the historical volatility of comparable companies' stock			–			104%	to	119%

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