Annual report pursuant to Section 13 and 15(d)

Note 5 - Investments - Marketable Securities (Details) (Parentheticals)

v3.20.2
Note 5 - Investments - Marketable Securities (Details) (Parentheticals)
Mar. 31, 2020
Mar. 31, 2019
Deposits [Member]    
Investment, interest 2.50% 2.50%
Deposits [Member] | Minimum [Member]    
Investment, maturity date Apr. 08, 2019 Apr. 08, 2019
Deposits [Member] | Maximum [Member]    
Investment, maturity date Mar. 12, 2020 Mar. 12, 2020
Canadian Treasury Bill [Member] | Minimum [Member]    
Investment, interest 1.83% 1.83%
Investment, maturity date Apr. 02, 2019 Apr. 02, 2019
Canadian Treasury Bill [Member] | Maximum [Member]    
Investment, interest 1.90% 1.90%
Investment, maturity date Jul. 25, 2019 Jul. 25, 2019