Note 7 - Stock Options and Stock Warrants - Summary of Warrants Outstanding (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Outstanding at beginning of year (in shares)	464,000	464,000
Outstanding at beginning of year, exercise price (in CAD per share)	$ 0.07	$ 0.07
Issued (in shares)
Issued, exercise price (in CAD per share)
Exercised (in shares)
Expired (in shares)	464,000
Outstanding at end of year (in shares)		464,000
Outstanding at end of year, exercise price (in CAD per share)		$ 0.07