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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) In Thousands, unless otherwise specified | Dec. 31, 2014 USD ($) | Dec. 31, 2014 CNY | Dec. 31, 2013 CNY
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |  |
Rental deposits | $ 136 us-gaap_DepositsAssetsCurrent | 843 us-gaap_DepositsAssetsCurrent | 2,105 us-gaap_DepositsAssetsCurrent
Prepayments | 6,789 us-gaap_PrepaidExpenseCurrent | 42,120 us-gaap_PrepaidExpenseCurrent | 7,769 us-gaap_PrepaidExpenseCurrent
Staff advances | 392 us-gaap_DueFromEmployeesCurrent | 2,435 us-gaap_DueFromEmployeesCurrent | 867 us-gaap_DueFromEmployeesCurrent
Interest receivable | 1,940 us-gaap_InterestReceivableCurrent | 12,040 us-gaap_InterestReceivableCurrent | 1,602 us-gaap_InterestReceivableCurrent
Receivables from third-party payment platform | 1,980 athm_ReceivableFromThirdPartyPaymentPlatform | 12,283 athm_ReceivableFromThirdPartyPaymentPlatform | 0 athm_ReceivableFromThirdPartyPaymentPlatform
Other receivables | 675 us-gaap_OtherReceivablesNetCurrent | 4,190 us-gaap_OtherReceivablesNetCurrent | 944 us-gaap_OtherReceivablesNetCurrent
Prepaid expenses and other current assets | $ 11,912 us-gaap_PrepaidExpenseAndOtherAssetsCurrent | 73,911 us-gaap_PrepaidExpenseAndOtherAssetsCurrent | 13,287 us-gaap_PrepaidExpenseAndOtherAssetsCurrent

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- Definition Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment within one year or during the operating cycle, if shorter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + Details
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- Definition Amounts due from an Entity employee, not to include stockholders or officers, which are usually due within 1 year (or 1 business cycle). + 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.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 1 -Article 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864 + Details
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