Note 10 - Stock Based Compensation (Tables)

3 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Schedule of Share-Based Payment Arrangement, Option, Activity

The following table summarizes information about activities within the Stock Option Plan for the three month period ended:

	June 30, 2022					June 30, 2021
	Weighted average exercise price		Number of options			Weighted average exercise price		Number of options
	CAD$					CAD$
Outstanding at beginning of period		3.94		2,989,381			8.33		911,871
Granted		1.15		1,262,500			—		—
Exercised		—		—			—		—
Forfeited		7.66		(22,263	)		10.35		(7,995	)
Expired		36.00		(2,113	)		—		—
Outstanding at end of period		3.07		4,227,505			8.32		903,876
Exercisable at end of period		6.49		1,197,835		9.13			672,081

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

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:

	Three Months ended
	June 30, 2022
		$
Exercise price	CAD $		1.15
Share price	CAD $		1.15
Weighted average grant-date fair value per award	CAD $		0.99
Volatility			117.47	%
Risk-free interest rate			3.29	%
Expected life			5.81
Dividend			—

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

Compensation expense recognized under the Stock Option Plan for the three months ended June 30, 2022 and 2021 was as follows:

	Three Months ended
	June 30, 2022		June 30, 2021
	$		$
Research and development expenses		158		50
General and administrative expenses		282		103
Sales and marketing expenses		24		—
		464		153