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Summary of Significant Accounting Policies - Summary of Components of Accumulated OCI (Detail) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]    
Net unrealized gain (loss) on marketable securities    $ (1,356)
Unrealized gain on foreign currency translation 252,101 194,533
Accumulated other comprehensive income $ 252,101 $ 193,177