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Accumulated Other Comprehensive Income - Summary of Changes in Accumulated Other Comprehensive Loss by Component (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Accumulated Other Comprehensive Income [Line Items]      
Beginning balance $ 193,177    
Other comprehensive income before reclassifications 58,924    
Amounts reclassified from accumulated other comprehensive loss       
Other comprehensive income (loss) 58,924 152,464 (79,009)
Ending balance 252,101 193,177  
Unrealized Gain (Loss) on Other Available-for-Sale Securities [Member]
     
Accumulated Other Comprehensive Income [Line Items]      
Beginning balance (1,356)    
Other comprehensive income before reclassifications 1,356    
Amounts reclassified from accumulated other comprehensive loss       
Other comprehensive income (loss) 1,356    
Ending balance       
Foreign Currency Translation [Member]
     
Accumulated Other Comprehensive Income [Line Items]      
Beginning balance 194,533    
Other comprehensive income before reclassifications 57,568    
Amounts reclassified from accumulated other comprehensive loss       
Other comprehensive income (loss) 57,568    
Ending balance $ 252,101