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9. Derivative Instruments (Details-Reconciliation of derivatives) - USD ($)
Sep. 30, 2015
Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Derivative assets $ 2,693,561 $ 3,571,803
Noncurrent derivative assets 0 4,007,942
Net amount of assets on the balance sheet 2,693,561 7,579,745
Current portion of derivative liabilities 0 0
Derivative liabilities 0 0
Net amounts of liabilities on the balance sheet 0 0
Total derivative assets (liabilities), net $ 2,693,561 $ 7,579,745