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Business combinations, Goodwill and Intangible assets - Additional Information (Detail)
 3 Months Ended 6 Months Ended
Jun. 30, 2013
USD ($)
Jun. 30, 2012
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2012
USD ($)
Mar. 22, 2013
USD ($)
Mar. 22, 2013
ARS
Jun. 30, 2013
24-Months Period [Member]
USD ($)
Jun. 30, 2013
36-Months Period [Member]
USD ($)
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]                
Percentage of acquisition         100.00% 100.00%    
Business acquisition rights of buyer description     On such same date, the Buyer paid and agreed to pay the purchase price as follows i) $2,191,781 in cash; ii) set an escrow amounting to $489,237 for a 24-months period, aiming to cover unexpected liabilities and negative working capital; iii) set an escrow amounting to $547,945 for a 36-months period, aiming to continue the employment relationship of certain key employees; and iv) on June 24, 2013 the Company paid the remaining $225,534 net of certain negative working capital adjustments.          
Business acquisition, cash pay     $ 2,191,781          
Escrow amount covering unexpected liabilities and negative working capital             489,237  
Escrow amount to continue employment relationship               547,945
Business acquisition payment subject to collection of credits held by certain customer 225,534   225,534          
Total purchase price         3,454,497 17,652,480    
Escrow for employment relationship         547,945      
Net revenues     500,255          
Net income     50,792          
Total aggregate amortization expense for intangible assets $ 216,587 $ 194,313 $ 437,446 $ 462,476