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Note 4 - Stock-Based Compensation (Detail) - Schedule of stock option activity: (USD $)
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Weighted Average Exercise Price (in Dollars per share) $ 4.40 $ 4.35
# of shares 115,600 103,600
Weighted Average Exercise Price (in Dollars per share) $ 5.27 $ 1.19
# of shares 12,000 12,000
Weighted Average Exercise Price (in Dollars per share) $ 4.48 $ 4.40
# of shares 127,600 115,600
Weighted Average Remaining Contractual Term (in years) 5 years 47 days 5 years 135 days
Aggregate Intrinsic Value (in Dollars) $ 216,332 $ 206,332
Exercisable, June 30, 2012 (in Dollars per share) $ 4.40  
Exercisable, June 30, 2012 115,600  
Exercisable, June 30, 2012 4 years 251 days 5 years 160 days
Exercisable, June 30, 2012 (in Dollars) 206,332  
Exercisable, June 30, 2011 (in Dollars per share)   $ 4.35
Exercisable, June 30, 2011   103,600
Exercisable, June 30, 2011 4 years 251 days 5 years 160 days
Exercisable, June 30, 2011 (in Dollars)   $ 192,075