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

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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.

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