Note 7 - Common Stock (Details Textual) $ / shares in Thousands	Jun. 05, 2020 $ / shares shares	Jun. 19, 2019 $ / shares shares	Dec. 31, 2020 $ / shares shares	Dec. 31, 2019 $ / shares shares
Common Stock, No Par Value (in dollars per share) | $ / shares			$ 0	$ 0
Common Stock, Shares Authorized (in shares)			500,000,000	500,000,000
Common Stock, Shares, Outstanding, Ending Balance (in shares)			86,522,569	67,022,568
Employee and Directors [Member]
Stock Issued During Period, Shares, New Issues (in shares)	1,766,667	7,500,000
Shares Issued, Price Per Share (in CAD per share) | $ / shares	$ 0.15	$ 0.075
Investors [Member]
Stock Issued During Period, Shares, New Issues (in shares)	7,000,001	13,950,000
Shares Issued, Price Per Share (in CAD per share) | $ / shares	$ 0.15	$ 0.075
OCL Technologies Corp [Member]
Stock Issued During Period, Shares, New Issues (in shares)	12,500,000
Shares Issued, Price Per Share (in CAD per share) | $ / shares	$ 0.15