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Commitments and Contingencies (Narrative) (Details)			6 Months Ended
Commitments and Contingencies (Narrative) (Details)	Apr. 05, 2018 USD ($)	Aug. 14, 2017 USD ($) tranche	Jun. 30, 2019 USD ($) shares
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Maximum length of warranty on software products			90 days
Uncertainty in income tax liability			$ 197,650
Chief Executive Officer
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Salary and Wage, NonOfficer, Excluding Cost of Good and Service Sold		$ 350,000
Accrued bonuses		$ 17,500
Percentage of outstanding stock, threshold		15.00%
Severance payment period		6 months
Award requisite period		6 months
Chief Financial Officer [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Salary and Wage, NonOfficer, Excluding Cost of Good and Service Sold	$ 240,000
Accrued bonuses	10,000
Deferred Bonus \| Chief Executive Officer
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Accrued bonuses		$ 200,000
Deferred Bonus \| Chief Financial Officer [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Accrued bonuses	70,000
Excess Capital	$ 27,500
Upon Stockholder Approval \| Chief Executive Officer
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of outstanding stock, threshold		2.50%
Number of tranches \| tranche		2
Upon Termination \| Chief Executive Officer
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Severance payment period		12 months
Award requisite period		12 months
Change of control period		6 months
FalconStor Software, Inc., 2018 Incentive Stock Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Shares Authorized (in shares) \| shares			1,471,997