Note 8 - Stockholders' Deficiency - Summary of Information Concerning Outstanding and Exercisable Stock Options (Details)	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Number outstanding (in shares)	1,605,000
Number exercisable (in shares)	1,267,500
Range 1 [Member]
Range of exercise prices per share (in dollars per share) | $ / shares	$ 0.42
Number outstanding (in shares)	880,000
Number exercisable (in shares)	880,000
Expiry date	Dec. 20, 2021
Range 2 [Member]
Range of exercise prices per share (in dollars per share) | $ / shares	$ 0.42
Number outstanding (in shares)	725,000
Number exercisable (in shares)	387,500
Expiry date	Nov. 08, 2022