Note 10 - Stock Based Compensation (Tables)

6 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Schedule of Share-Based Payment Arrangement, Option, Activity

information about activities within the Stock Option Plan for the six-month period ended September 30, 2023:

	Number of options			Weighted average exercise price		Weighted average grant date fair value
Outstanding, March 31, 2023		740,957			13.60		11.23
Granted		446,502			2.64		2.27
Exercised		(12,500	)		1.27		2.27
Forfeited/Cancelled		(613,594	)		13.68		1.61
Outstanding, September 30, 2023		561,365			4.14		2.08
Exercisable, September 30, 2023		141,455			6.70		1.56

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions

The weighted average grant date fair value of awards for options granted during the six months ended September 30, 2023 was $2.27. The fair value of options granted was estimated using the Black-Scholes option pricing model, resulting in the following weighted average assumptions for the options granted:

	September 30, 2023
	Weighted average
Exercise price	$2.64
Share price	$2.64
Dividend	0%
Risk-free interest	3.62%
Estimated life (years)	5.78
Expected volatility	118.40%

Schedule of Share-Based Payment Arrangement, Expensed and Capitalized, Amount

Compensation expense recognized under the stock option plan is summarized as follows:

	Three months ended				Six months ended
	September 30, 2023		September 30, 2022		September 30, 2023		September 30, 2022
	$		$		$		$
Research and development expenses		82		184		84		342
General and administrative expenses		198		368		258		650
Sales and marketing expenses		-		30		16		54
		280		582		358		1,046