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1. Nature of Activities and Summary of Significant Accounting Policies (Details)	Mar. 31, 2013	Dec. 31, 2012
Nature Of Activities And Summary Of Significant Accounting Policies Details
Aemetis Series B preferred	3,097,725	3,097,725
Aemetis Series B warrants		29,197
Aemetis Common stock options and warrants	11,757,358	9,000,683
Convertible interest & fees on note – related party	18,149	374,332
Convertible promissory note	180,542	172,242
Total number of potentially dilutive shares excluded from the diluted net income/(loss) per share calculation	15,053,774	12,674,179