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Share-Based Payment Arrangements (Details) - shares
Dec. 31, 2018
Sep. 30, 2018
Jun. 22, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares Outstanding 1,353,700     2,026,200
FalconStor Software, Inc., 2018 Incentive Stock Plan Member        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares authorized (in shares) 147,199,698 147,199,698    
Shares Available for grant 147,199,698   147,199,698  
Shares Outstanding 0