Note 6 - Common Stock (Details Textual) $ / shares in Units, $ / shares in Thousands			6 Months Ended
	Jun. 14, 2021 USD ($) shares	Jun. 14, 2021 CAD ($) $ / shares shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2021 USD ($) $ / shares shares	Dec. 31, 2021 $ / shares shares
Common Stock, No Par Value (in dollars per share) | $ / shares			$ 0	$ 0	$ 0
Common Stock, Shares Authorized (in shares)			500,000,000	500,000,000	500,000,000
Common Stock, Shares, Outstanding, Ending Balance (in shares)			91,422,569	91,422,569	91,422,569
Common Stock, Shares Held in Escrow (in shares)					5,175,000
Payments of Stock Issuance Costs | $			$ (0)	$ 36,370
Warrants Issued in Connection with Private Placement [Member]
Equity Offering, Number of Warrants Per Unit (in shares)		1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)		1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in CAD per share) | $ / shares		$ 1.00
Warrants and Rights Outstanding, Term (Month)		24 months
Class of Warrant of Right, Stock Price Trigger (in CAD per share) | $ / shares		$ 2.50
Class of Warrant or Right, Threshold Consecutive Trading Days	10	10
Payments of Stock Issuance Costs	$ 36,370	$ 45,500
Private Placement [Member]
Equity Offering, Number of Units Issued (in shares)	4,900,000	4,900,000
Equity Offering, Price Per Unit Issued (in CAD per share) | $ / shares		$ 0.80
Proceeds from Issuance or Sale of Equity, Total	$ 3,098,616	$ 3,920,000
Equity Offering, Number of Common Shares Per Unit (in shares)		1