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1. Nature of Activities and Summary of Significant Accounting Policies (Details)	Sep. 30, 2013	Sep. 30, 2012
Disclosure1.NotesOfActivitiesAndSummaryOfSignificantAccountingPoliciesDetailsAbstract
Aemetis Series B preferred	3,021,060
Aemetis Series B warrants		3,008
Aemetis Common stock options and warrants	15,308,058	1,776,067
Convertible interest & fees on note – related party		1,029,973
Convertible promissory note	184,703
Total number of potentially dilutive shares excluded from the diluted net income/(loss) per share calculation	18,513,821	2,809,048