Note 8 - Shareholders' Equity (Details) - Options Outstanding (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Note 8 - Shareholders' Equity (Details) - Options Outstanding [Line Items]
Exercise Price	$ 1.57	$ 1.33
Outstanding (in Shares)	1,262,763	712,763
Weighted average remaining contractual term	7 years 237 days	5 years 138 days
Weighted average exercise price (in Shares)	485,263
Options exercisable	$ 1.45
Range 1 [Member]
Note 8 - Shareholders' Equity (Details) - Options Outstanding [Line Items]
Lower Exercise Price	$ 0.68
Exercise Price	$ 0.73
Higher Exercise Price	$ 0.84
Outstanding (in Shares)	55,763
Weighted average remaining contractual term	4 years 255 days
Weighted average exercise price (in Shares)	45,763
Options exercisable	$ 0.74
Range 2 [Member]
Note 8 - Shareholders' Equity (Details) - Options Outstanding [Line Items]
Lower Exercise Price	$ 1.05
Exercise Price	$ 1.21
Higher Exercise Price	$ 1.32
Outstanding (in Shares)	80,000
Weighted average remaining contractual term	4 years 335 days
Weighted average exercise price (in Shares)	50,000
Options exercisable	$ 1.15
Range 3 [Member]
Note 8 - Shareholders' Equity (Details) - Options Outstanding [Line Items]
Lower Exercise Price	$ 1.51
Exercise Price	$ 1.65
Higher Exercise Price	$ 1.69
Outstanding (in Shares)	1,077,000
Weighted average remaining contractual term	8 years 105 days
Weighted average exercise price (in Shares)	339,500
Options exercisable	$ 1.54
Range 4 [Member]
Note 8 - Shareholders' Equity (Details) - Options Outstanding [Line Items]
Exercise Price	$ 1.79
Outstanding (in Shares)	50,000
Weighted average remaining contractual term	5 years 222 days
Weighted average exercise price (in Shares)	50,000
Options exercisable	$ 1.79