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Other Current Liabilities - Summary of Other Current Liabilities (Detail) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Other Liabilities Disclosure [Abstract]    
Accrued payroll expenses $ 2,247,886 $ 2,094,539
Deferred revenue 1,156,510 840,547
Dividends payable 1,032,573 1,027,628
Trade sales payable 761,344 693,819
Deferred rent 560,169 351,648
Income taxes payable   2,413,145
Prorations payable   1,575,428
Other accrued expenses 1,829,624 867,774
Other current liabilities $ 7,588,106 $ 9,864,528