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16. Income Tax (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Abstract] |  |  |
United States | $ 8,652 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic | $ (24,712)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic | $ (2,981)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign | (1,513)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | 281 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | (2,382)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Pretax Income | $ 7,139 AMTX_LossBeforeIncomeTaxes | $ (24,431)AMTX_LossBeforeIncomeTaxes | $ (5,363)AMTX_LossBeforeIncomeTaxes

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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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