Fair Value Measurement of Assets and Liabilities - Fair Value of Financial Assets and Liabilities Measured at Amortized Cost (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Carrying Value [Member]
Assets
Assets	$ 184,331,377	$ 162,634,066
Liabilities
Liabilities	223,034,754	167,447,638
Carrying Value [Member] | Accounts Payable [Member]
Liabilities
Liabilities	34,405,333	23,976,613
Carrying Value [Member] | Funds Payable to Customers [Member]
Liabilities
Liabilities	129,038,663	101,472,662
Carrying Value [Member] | Salaries and Social Security Payable [Member]
Liabilities
Liabilities	15,863,028	14,994,186
Carrying Value [Member] | Tax Payable [Member]
Liabilities
Liabilities	17,854,110	19,210,568
Carrying Value [Member] | Dividends Payable [Member]
Liabilities
Liabilities	6,313,869	4,812,396
Carrying Value [Member] | Loans Payable and Other Financial Liabilities [Member]
Liabilities
Liabilities	15,860,642	144,063
Carrying Value [Member] | Other Liabilities [Member]
Liabilities
Liabilities	3,699,109	2,837,150
Carrying Value [Member] | Time Deposits [Member]
Assets
Assets	66,677,156	87,379,121
Carrying Value [Member] | Accounts Receivable [Member]
Assets
Assets	25,884,260	19,837,022
Carrying Value [Member] | Credit Cards and other Means of Payments [Member]
Assets
Assets	52,045,851	35,816,506
Carrying Value [Member] | Prepaid Expenses [Member]
Assets
Assets	3,836,081	2,080,079
Carrying Value [Member] | Other Assets [Member]
Assets
Assets	35,888,029	17,521,338
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets
Assets	184,331,377	162,634,066
Liabilities
Liabilities	223,034,754	167,447,638
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Accounts Payable [Member]
Liabilities
Liabilities	34,405,333	23,976,613
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Funds Payable to Customers [Member]
Liabilities
Liabilities	129,038,663	101,472,662
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Salaries and Social Security Payable [Member]
Liabilities
Liabilities	15,863,028	14,994,186
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Tax Payable [Member]
Liabilities
Liabilities	17,854,110	19,210,568
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Dividends Payable [Member]
Liabilities
Liabilities	6,313,869	4,812,396
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Loans Payable and Other Financial Liabilities [Member]
Liabilities
Liabilities	15,860,642	144,063
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Liabilities [Member]
Liabilities
Liabilities	3,699,109	2,837,150
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Time Deposits [Member]
Assets
Assets	66,677,156	87,379,121
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Accounts Receivable [Member]
Assets
Assets	25,884,260	19,837,022
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Credit Cards and other Means of Payments [Member]
Assets
Assets	52,045,851	35,816,506
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Prepaid Expenses [Member]
Assets
Assets	3,836,081	2,080,079
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Assets [Member]
Assets
Assets	$ 35,888,029	$ 17,521,338