Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Property and Equipment, Net (Tables)

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Property and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2015
Property and Equipment, Net [Abstract]  
Schedule of property and equipment, net
    December 31,  
      2014     2015  
  Cost:            
  Computers   $ 39,914     $ 43,964  
  Office furniture and equipment     400,705       437,035  
  Leasehold improvements     21,764       23,458  
                   
        462,383       504,457  
  Accumulated depreciation:     235,837       286,663  
                   
  Property and equipment, net   $ 226,546     $ 217,794