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Share-Based Payment Arrangements (Details Narrative) - USD ($)
12 Months Ended
Oct. 29, 2015
Jul. 28, 2015
Jul. 01, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jul. 24, 2015
Jun. 26, 2014
Sep. 13, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Total number of shares outstanding (in shares)       41,666,747 40,924,313        
Options contractual term (maximum)   10 years   10 years          
Proceeds from stock options, exercised       $ 59,242 $ 24,684 $ 697,500      
Intrinsic value of stock options, exercised       9,970 3,836 121,819      
Recognition of tax benefits related to share-based compensation expense       0 0 0      
Market condition, weighted average grant date fair value   $ 1.05              
Total intrinsic value of restricted stock for which the restrictions lapsed       400,000 500,000 200,000      
Share-based compensation expense       $ 1,929,377 $ 1,466,183 $ 1,705,429      
Share price (in dollars per share)               $ 1.69 $ 1.23
Weighted average fair value of share-based payments granted (in dollars per share)       $ 1.32 $ 1.26 $ 0.84      
Estimated forfeiture rate for officers       30.00% 30.00% 30.00%      
Estimated forfeiture rate for employees       30.00% 30.00% 30.00%      
Estimated forfeiture rate for directors       0.00% 0.00% 0.00%      
Reduction to share-based compensation expense due to change in forfeiture rates           $ 100,000      
Restricted stock awards, granted       1,493,555          
Total unrecognized compensation costs       $ 1,900,000          
Weighted-average period of recognition for unrecognized compensation cost       1 year 10 months 7 days          
Common stock reserved for issuance upon the exercise of stock options, restricted stock and restricted stock units       11,096,900          
FalconStor Software, Inc., 2006 Incentive Stock Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Total shares available for issuance     3,246,122 2,914,559          
Maximum shares outstanding under plan, percentage     5.00%            
Maximum number of shares authorized (in shares)     20,000,000 13,455,546          
Total number of shares outstanding (in shares)     40,920,192            
President and Chief Executive Officer                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Restricted share grants   500,000         500,000    
Non-employee consultants                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Options contractual term (maximum)       10 years          
Vested period for options granted       3 years          
Directors, officers, and employees                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Options contractual term (maximum)       10 years          
Vested period for options granted       3 years          
Restricted stock | Non-employee consultants                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share-based compensation expense       $ 0 $ 0 $ 0      
Cumulus Logic, LLC | Non-employee consultants                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share-based compensation expense $ 504,535                
Share price (in dollars per share) $ 1.99                
Common stock | Cumulus Logic, LLC | Non-employee consultants                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares issued related to the Software License and Development Agreement 253,535