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Share-Based Payment Arrangements (Details) - shares
12 Months Ended
Dec. 31, 2015
Jul. 01, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares Outstanding 4,855,941   5,466,936
FalconStor Software, Inc., 2006 Incentive Stock Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares Authorized 13,455,546 20,000,000  
Shares Available for grant 2,914,559 3,246,122  
Shares Outstanding 7,310,270    
Last date for grant of shares May 17, 2016    
FalconStor Software, Inc., 2013 Outside Directors Equity Compensation Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares Authorized 400,000    
Shares Available for grant 210,000    
Shares Outstanding 133,900    
Last date for grant of shares May 09, 2016