Note 7 - Stock Options (Details Textual)				3 Months Ended				12 Months Ended
	Jan. 29, 2021 CAD ($) $ / shares shares	Dec. 21, 2020 CAD ($) $ / shares shares	Jul. 21, 2020 CAD ($) $ / shares shares	Mar. 31, 2022 USD ($) shares	Mar. 31, 2022 CAD ($) $ / shares shares	Mar. 31, 2021 USD ($)	Mar. 31, 2021 CAD ($)	Dec. 31, 2021 CAD ($) $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)				100,000	100,000			1,465,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)					2,535,000
Share-Based Payment Arrangement, Expense | $				$ 139,648		$ 177,490
Rolling Stock Option Plan [Member]
Share-based Compensation Arrangement, Percent of Issued and Outstanding Common Shares Reserved					10.00%			10.00%
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of August 1, 2024 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)				100,000	100,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)					100,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in CAD per share) | $ / shares					$ 0.80
Share-based Compensation Arrangement by Share-based Payment Award, Options, Fair Value | $					$ 54,600
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate				119.10%	119.10%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)				3 years	3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions				1.24%	1.24%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate				0.00%	0.00%
Share-Based Payment Arrangement, Expense				$ 6,281	$ 7,957
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of August 1, 2024 [Member] | Vesting Every Six Months [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in CAD per share) | $ / shares					$ 0.78
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage				20.00%	20.00%
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of January 29, 2024 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)	500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in CAD per share) | $ / shares	$ 1.20
Share-based Compensation Arrangement by Share-based Payment Award, Options, Fair Value | $	$ 424,300
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate	125.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)	3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions	0.14%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%
Share-Based Payment Arrangement, Expense				$ 31,242	$ 39,576	51,351	$ 65,035
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of January 29, 2024 [Member] | Vesting Every Six Months [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in CAD per share) | $ / shares	$ 1.18
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage	20.00%
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of June10, 2024 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)								375,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)								375,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in CAD per share) | $ / shares								$ 0.80
Share-based Compensation Arrangement by Share-based Payment Award, Options, Fair Value | $								$ 211,700
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate								120.80%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)								3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions								0.25%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate								0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in CAD per share) | $ / shares								$ 0.80
Rolling Stock Option Plan [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)			3 years
Share-Based Payment Arrangement, Expense				21,146	26,787	0
Rolling Stock Option Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Vesting Every Six Months [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage								20.00%
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of October 14, 2024 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)								590,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)								590,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in CAD per share) | $ / shares								$ 0.60
Share-based Compensation Arrangement by Share-based Payment Award, Options, Fair Value | $								$ 219,100
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate								119.89%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)								3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions								0.63%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate								0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in CAD per share) | $ / shares								$ 0.54
Share-Based Payment Arrangement, Expense				39,002	49,406	0
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of October 14, 2024 [Member] | Vesting Every Six Months [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage								20.00%
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of July 21, 2023 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			3,600,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)			3,600,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in CAD per share) | $ / shares			$ 0.35
Share-based Compensation Arrangement by Share-based Payment Award, Options, Fair Value | $			$ 909,900
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate			125.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions			0.27%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate			0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in CAD per share) | $ / shares			$ 0.35
Share-Based Payment Arrangement, Expense				37,352	47,316	107,248	135,829
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of July 21, 2023 [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			20.00%
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of December 21, 2023 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		250,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)		250,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in CAD per share) | $ / shares		$ 0.45
Share-based Compensation Arrangement by Share-based Payment Award, Options, Fair Value | $		$ 75,800
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate		125.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)		3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions		0.02%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in CAD per share) | $ / shares		$ 0.425
Share-Based Payment Arrangement, Expense				$ 4,625	$ 5,859	$ 18,890	$ 23,925
Rolling Stock Option Plan [Member] | Employee Stock Option, Expiration Date of December 21, 2023 [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage		20.00%