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Note 8 - Computation of Income (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Restricted Stock [Member]        
Non-vested Restricted Stock Grants - Weighted Average Common Shares Outstanding (in shares) 21,093 33,366 20,992
Net Income (Loss) Attributable to Parent $ (582,313) $ 689,321 $ 71,084 $ 978,134
Basic Loss Per Share (in shares) 3,957,012 3,872,073 3,956,609 3,871,960
Basic Loss Per Share (in dollars per share) $ (0.15) $ 0.18 $ 0.02 $ 0.25
Diluted Loss Per Share (in shares) 3,957,012 3,893,166 3,989,975 3,892,952
Diluted Loss Per Share (in dollars per share) $ (0.15) $ 0.18 $ 0.02 $ 0.25