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Significant Accounting Policies - Schedule of Property and Equipment Estimated Useful Lives (Details) (Parenthetical) (Leasehold Improvements, Maximum)
12 Months Ended
Dec. 31, 2014
Leasehold Improvements | Maximum
 
Property Plant And Equipment [Line Items]  
Property and equipment, useful life 10 years [1]
[1] Leasehold improvements are depreciated over the lesser of the estimated useful life, remaining lease term, or 10 years.