Cover
| Cover - USD ($) | 12 Months Ended | ||
| Dec. 31, 2022 | Mar. 31, 2023 | Jun. 30, 2022 | |
| Cover [Abstract] | |||
| Document Type | 10-K/A | ||
| Document Annual Report | true | ||
| Document Period End Date | Dec. 31, 2022 | ||
| Document Transition Report | false | ||
| Entity File Number | 0-23970 | ||
| Entity Registrant Name | FALCONSTOR SOFTWARE, INC. | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Tax Identification Number | 77-0216135 | ||
| Entity Address, Address Line One | 501 Congress Avenue, Suite 150 | ||
| Entity Address, City or Town | Austin | ||
| Entity Address, State or Province | TX | ||
| Entity Address, Postal Zip Code | 78701 | ||
| City Area Code | 631 | ||
| Local Phone Number | 777-5188 | ||
| Title of 12(g) Security | Common stock, $0.001 Par Value | ||
| Trading Symbol | FALC | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Non-accelerated Filer | ||
| Entity Small Business | true | ||
| Entity Emerging Growth Company | false | ||
| Entity Shell Company | false | ||
| ICFR Auditor Attestation Flag | false | ||
| Entity Public Float | $ 3,742,024 | ||
| Entity Common Stock, Shares Outstanding | 7,122,199 | ||
| Entity Central Index Key | 0000922521 | ||
| Amendment Flag | true | ||
| Amendment Description | On March 23, 2023, FalconStor Software, Inc., a Delaware corporation, filed its Annual Report on Form 10-K for the fiscal year ended December 31, 2022 (the “Original Filing”). Certain Part III information was omitted from the Original Filing in reliance on General Instruction G(3) to Form 10-K. General Instruction G(3) to Form 10-K provides that a registrant may incorporate by reference certain information from a definitive proxy statement which involves the election of directors, if such definitive proxy statement is filed with the Securities and Exchange Commission (the “Commission”) no later than 120 days after the end of the registrant’s fiscal year. Alternatively, the registrant may provide this information in an amendment to the Form 10-K, if such amendment is filed with the Commission no later than 120 days after the end of the registrant’s fiscal year. Accordingly, this Amendment No. 1 on Form 10-K/A (this “Amendment”) supplements the Original Filing by amending and restating Part III, Items 10 through 14 of the Original Filing. Except as stated herein, this Amendment does not reflect events occurring after the filing of the Original Filing, and no attempt has been made in this Amendment to modify or update other disclosures as presented in the Original Filing. Throughout this Amendment, unless indicated otherwise, we refer to FalconStor Software, Inc. and its subsidiaries as “we,” “us,” “our,” “FalconStor,” “FalconStor Software” and the “Company”. | ||
| Current Fiscal Year End Date | --12-31 | ||
| Document Fiscal Period Focus | FY | ||
| Document Fiscal Year Focus | 2022 | ||
| Documents Incorporated by Reference [Text Block] | The following documents (or parts thereof) are incorporated by reference into the following parts of this Form 10-K: None. | ||
| Auditor Name | Marcum LLP | ||
| Auditor Location | Costa Mesa, CA, | ||
| Auditor Firm ID | 688 |