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Note 13 - Fair Value Measurement (Details) - Summary of fair values of Company’s derivative instrument assets (USD $)
Sep. 30, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative instrument asset $ 466,409 $ 444,782
Derivative instrument liability 310,865  
Fair Value, Inputs, Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative instrument asset 466,409 444,782
Derivative instrument liability $ 310,865