Note 3 - Stock-based Compensation (Details) - Summary of Stock Option Activity (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Summary of Stock Option Activity [Abstract]
Weighted Average Exercise Price	$ 5.17	$ 5.04	$ 5.16	$ 5.04
# of shares	70,400	84,600	72,400	84,600
Weighted Average Remaining Contractual Term (in years)	6 years 25 days	6 years 262 days
Aggregate Instrinsic Value	$ 86,886	$ 104,656
Weighted Average Exercise Price	$ 5.17	$ 5.04
# of shares	70,400	84,600
Weighted Average Remaining Contractual Term (in years)	6 years 25 days	6 years 262 days
Aggregate Instrinsic Value	$ 86,886	$ 104,656
Weighted Average Exercise Price	$ (4.96)
# of shares	(2,000)