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Note 3 - Short-Term Investments (Tables)
12 Months Ended
Dec. 31, 2012
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
   
December 31, 2012
   
   
Amortized
Cost
   
Gross
Unrealized
Gains
   
Gross
Unrealized
Losses
   
Fair Value
   
                           
U.S. Government backed securities
  $ 3,922,428     $ 867     $ (211 )   $ 3,923,084    
Certificate of Deposit  (1)
    4,056,977       468       -       4,057,445    
Corporate Bonds
    454,233       182       -       454,415    
    $ 8,433,638     $ 1,517     $ (211 )   $ 8,434,944    
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
   
Fair Value Measurements as of December 31, 2012
   
   
Level 1
   
Level 2
   
Level 3
   
Balance as of
December 31, 2012
   
Description
                         
U.S. Government backed securities
  $ -     $ 3,923,084     $ -     $ 3,923,084    
Certificate of Deposit
    -       4,057,445       -       4,057,445    
Corporate Bonds
    -       454,415       -       454,415    
    $ -     $ 8,434,944     $ -     $ 8,434,944