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Note 13 - Fair Value Measurement (Detail) - The following table provides a summary of the fair values of the Company’s derivative instrument assets (USD $)
Mar. 31, 2013
Dec. 31, 2012
Derivative instrument asset $ 83,622 $ 444,782
Derivative instrument liability   275,766
Fair Value, Inputs, Level 2 [Member]
   
Derivative instrument asset 83,622 444,782
Derivative instrument liability   $ 275,766