Note 4 - Accounting for Stock-based Compensation - Option Activity (Details) - USD ($)		9 Months Ended	12 Months Ended
		Sep. 30, 2015	Dec. 31, 2014
Outstanding, amount of options (in shares)		1,262,763
Outstanding, weighted average exercise price (in dollars per share)		$ 1.57
Outstanding, weighted average remaining contractual term (years)		7 years 29 days	7 years 237 days
Outstanding, aggregate intrinsic value	[1]	$ 1	$ 40,570
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		135,000
Granted, weighted average exercise price (in dollars per share)		$ 0.68
Fortfeited, amount of options (in shares)		150,000
Fortfeited, weighted average exercise price (in dollars per share)		$ 1.44
Outstanding, amount of options (in shares)		1,247,763	1,262,763
Outstanding, weighted average exercise price (in dollars per share)		$ 1.48	$ 1.57
Exercisable, amount of options (in shares)		656,513
Exercisable, weighted average exercise price (in dollars per share)		$ 1.52
Exercisable, weighted average remaining contractual term (years)		5 years 222 days

[1] Calculation of aggregate intrinsic value is based upon the share price of the Company’s common stock as of September 30, 2015 ($0.67) per share).