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Note 5 - Deferred Charges, Net (Tables)
12 Months Ended
Dec. 31, 2012
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
   
2011
   
2012
 
Balance, beginning of year
    599,374       697,951  
Additions, deferred offering expenses
    243,392       -  
Amortization of loan arrangement fees
    (144,815 )     (135,981 )
Deferred offering expenses reclassified to paid-in capital
    -       (243,392 )
Balance, end of year
    697,951       318,578