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1. Nature of Activities and Summary of Significant Accounting Policies (Details 1)
Mar. 31, 2015
Mar. 31, 2014
Accounting Policies [Abstract]    
Series B preferred (convertible on a 10 to 1 basis) 1,558AMTX_AemetisSeriesBPreferredInstant   
Common stock options and warrants 1,251AMTX_AemetisCommonStockOptionsAndWarrantsInstant 1,137AMTX_AemetisCommonStockOptionsAndWarrantsInstant
Total number of potentially dilutive shares excluded from the basic and diluted net income (loss) per share calculation 2,809AMTX_TotalNumberOfPotentiallyDilutiveSharesExcludedFromDilutedNetIncomelossPerShareCalculation 1,137AMTX_TotalNumberOfPotentiallyDilutiveSharesExcludedFromDilutedNetIncomelossPerShareCalculation