19. Fair Value Measurement (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Financial assets (liabilties):
Commodity contracts	$ 133,150	$ 495,900
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member]
Financial assets (liabilties):
Commodity contracts	$ 133,150	$ 495,900
Significant Other Observable Inputs (Level 2) [Member]
Financial assets (liabilties):
Commodity contracts
Significant Unobservable Inputs (Level 3) [Member]
Financial assets (liabilties):
Commodity contracts