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Share-Based Payment Arrangements (Detail Narrative) - USD ($)
3 Months Ended
Jul. 01, 2017
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Sep. 13, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common stock, shares outstanding (in shares) 44,525,990 44,566,890   44,563,490  
Share-based compensation expense   $ (22,895) $ 445,414    
Stock Price (in dollars per share)   $ 0.01     $ 1.23
FalconStor Software, Inc., 2016 Incentive Stock Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares Available for Grant 2,226,300 3,191,300      
Maximum Shares Outstanding Under Plan Percentage 5.00%        
Shares Authorized 20,000,000 4,247,686      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period 2,081,080        
FalconStor Software, Inc., 2016 Outside Directors Equity Compensation Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares Available for Grant   993,400      
Shares Authorized   1,000,000      
Research and development costs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense   $ 22,606 $ 129,715