Note 6 - Stockholders' Equity (Deficiency) - Stock Option Activity (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Outstanding, number of options, balance (in shares)	1,605,000	1,010,000
Outstanding, weighted average exercise price, balance (in dollars per share)	$ 0.42	$ 0.42
Granted, number of options (in shares)		725,000
Granted, weighted average exercise price (in dollars per share)		$ 0.42
Exercised, number of options (in shares)
Exercised, weighted average exercise price (in dollars per share)
Cancelled, number of options (in shares)	(75,000)	(130,000)
Cancelled, weighted average exercise price (in dollars per share)	$ (0.42)	$ (0.42)
Cancelled, number of options (in shares)	75,000	130,000
Outstanding, number of options, balance (in shares)	1,530,000	1,605,000
Outstanding, weighted average exercise price, balance (in dollars per share)	$ 0.42	$ 0.42