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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Abstract] |  |  |
Total amount disclosed in the consolidated balance sheet | $ 12,682,657 us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 13,706,426 us-gaap_DeferredTaxAssetsLiabilitiesNet |
Amount disclosed in the balance sheet as current asset | 11,519,522 us-gaap_DeferredTaxAssetsNetCurrent | 16,030,880 us-gaap_DeferredTaxAssetsNetCurrent |
Amount disclosed in the balance sheet as non-current asset | 21,553,696 us-gaap_DeferredTaxAssetsNetNoncurrent | 3,014,905 us-gaap_DeferredTaxAssetsNetNoncurrent |
Amount disclosed in the balance sheet as current liability | 1,644,706 us-gaap_DeferredTaxLiabilitiesCurrent |  |
Amount disclosed in the balance sheet as non-current liability | 18,745,855 us-gaap_DeferredTaxLiabilitiesNoncurrent | 5,339,359 us-gaap_DeferredTaxLiabilitiesNoncurrent |
Consolidated loss carryforwards for income tax purpose | 8,755,535 us-gaap_OperatingLossCarryforwards |  |
Tax loss carryforward | 2,611,877 us-gaap_TaxCreditCarryforwardAmount |  |
Foreign and domestic valuation allowance reduced amount | 63,473 meli_DecreaseInValuationAllowance | 156,851 meli_DecreaseInValuationAllowance |
Valuation allowance relating to Argentine operation | 442,903 meli_IncreaseInDeferredTaxValuationAllowance | 290,561 meli_IncreaseInDeferredTaxValuationAllowance |
Foreign and domestic valuation allowance reversed amount |  |  | 240,653 us-gaap_ValuationAllowancesAndReservesRecoveries
Non-U.S subsidiaries' undistributed earnings | $ 96,700,000 meli_UndistributedEarningsForeignSubsidiaries |  |

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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