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Note 2 - Stock-based Compensation (Tables)
3 Months Ended
Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]
   
# of Shares
   
Wgt Avg
Exercise Price
   
Wgt Avg
Remaining
Contractual Life
in Years
   
Aggregate
Intrinsic
Value
 
Outstanding at March 31, 2013
    265,500     $ 1.78       6.8     $ 17,780  
Vested and exercisable at March 31, 2013
    140,833     $ 1.92       5.5     $ 15,847