Note 3 - Stock-Based Compensation (Details) - Summary of Stock Option Activity (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Summary of Stock Option Activity [Abstract]
Weighted Average Exercise Price	$ 5.04	$ 4.53
# of shares	84,600	121,600
Weighted Average Exercise Price		$ 6.87
# of shares	34,601	12,000
Weighted Average Exercise Price		$ 4.24
# of shares		(22,000)
Weighted Average Exercise Price	$ 5.04	$ 4.84
# of shares	84,600	111,600
Weighted Average Remaining Contractual Term (in years)	6 years 171 days	5 years 262 days
Aggregate Intrinsic Value	$ 104,656	$ 167,186
Weighted Average Exercise Price	$ 5.04	$ 4.60
# of shares	84,600	99,600
Weighted Average Remaining Contractual Term (in years)	6 years 171 days	5 years 87 days
Aggregate Intrinsic Value	$ 104,656	$ 155,500