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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 28, 2013
Jun. 30, 2013
ExchangeRate
Mar. 31, 2013
Jun. 30, 2012
Jun. 30, 2013
ExchangeRate
Jun. 30, 2012
Dec. 31, 2012
Significant Accounting Policies [Line Items]              
Percentage of revenues and operating costs generated in foreign operations         99.60% 99.40%  
Long-lived assets located in the foreign operations   $ 136,822,517     $ 136,822,517   $ 98,569,068
Exchange rate used to re-measure transactions   6.30     6.30    
Foreign currency loss 6,400,000   6,400,000   6,420,929    
Percentage of consolidated net assets   14.70%     14.70%    
Percentage of consolidated cash and investments   13.00%     13.00%    
Percentage of tax benefits obtained from software development law   From fiscal year 2008, the Company's Argentine subsidiary is beneficiary of a software development law. Part of the benefits obtained from being beneficiary of the aforementioned law is a relief of 60% of total income tax determined in each year, until fiscal year 2014.          
Percentage on relief of total income tax   60.00%          
Aggregate tax benefit, total   $ 2,275,176   $ 2,153,761 $ 4,769,024 $ 4,125,240  
Aggregate per share effect of the Argentine tax holiday   $ 0.05   $ 0.05 $ 0.11 $ 0.09  
Tax holidays         5 years    
SITME [Member]
             
Significant Accounting Policies [Line Items]              
Exchange rate used to re-measure transactions   5.30     5.30    
Minimum [Member]
             
Significant Accounting Policies [Line Items]              
Exchange rate used to re-measure transactions   4.30     4.30    
Minimum [Member] | SITME [Member]
             
Significant Accounting Policies [Line Items]              
Exchange rate used to re-measure transactions   5.30     5.30    
Maximum [Member]
             
Significant Accounting Policies [Line Items]              
Exchange rate used to re-measure transactions   6.30     6.30    
Maximum [Member] | SITME [Member]
             
Significant Accounting Policies [Line Items]              
Exchange rate used to re-measure transactions   6.30     6.30