Note 3 - Stock-Based Compensation (Details) - Summary of stock option activity: (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Summary of stock option activity: [Abstract]
Weighted Average Exercise Price (in Dollars per share)	$ 4.53	$ 4.40
# of shares	121,600	115,600
Weighted Average Exercise Price (in Dollars per share)	$ 6.87	$ 5.27
# of shares	12,000	12,000
Weighted Average Exercise Price (in Dollars per share)	$ 4.23	$ 2.72
# of shares	(49,000)	(2,000)
Weighted Average Exercise Price (in Dollars per share)	$ 5.04	$ 4.51
# of shares	84,600	125,600
Weighted Average Remaining Contractual Term (in years)	7 years 80 days	4 years 339 days
Aggregate Intrinsic Value (in Dollars)	$ 104,656	$ 213,256
Weighted Average Exercise Price (in Dollars per share)	$ 5.04	$ 4.51
# of shares	84,600	125,600
Weighted Average Remaining Contractual Term (in years)	7 years 80 days	4 years 339 days
Aggregate Intrinsic Value (in Dollars)	$ 104,656	$ 213,256