Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Apr. 25, 2014	Jun. 30, 2013
Document Information [Line Items]
Entity Registrant Name	NEOMEDIA TECHNOLOGIES INC
Entity Central Index Key	0001022701
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Trading Symbol	NEOM
Entity Common Stock, Shares Outstanding		4,984,827,279
Document Type	10-K
Document Period End Date	Dec. 31, 2013
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2013
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 2,945,890
Amendment Description	We are filing this amendment to amend our annual report on Form 10-K for the fiscal year ended December 31, 2013, which was originally filed with the Securities and Exchange Commission on March 17, 2014. During the three month period ended March 31, 2014, for fair value accounting of the derivative financial instruments and debentures payable, we reassessed the valuation techniques used to estimate the liability fair values. Based on the assessment, we determined that the valuation technique should be modified to consider the potentially dilutive impact on the stock price resulting from the issuance of additional shares of common stock upon the conversion of the instruments as well as the resulting value in comparison to our market capitalization. On July 16, 2014, after a series of comment letters beginning November 22, 2013, we received correspondence from the Securities and Exchange Commission (“SEC”), requesting that (i) we restate certain of our financial statements by filing amendments to the reports containing such financials, and (ii) we file an 8-K to report non- reliance on such financials. In its correspondence, the SEC asserted that certain modifications in our valuation methodology, deemed as accounting estimates, contained errors with respect to the valuation of convertible debentures issued by us, in that such methodology did not capture the debentures’ potentially dilutive effect upon their conversion into common stock. We agreed with the SEC’s assertion that certain modifications in our valuation methodology contained errors with respect to the valuation of convertible debentures issued by us. Thus, we are restating our financial statements for the fiscal year ended December 31, 2013 and sections related therewith to reflect the change in valuation technique and correction of the fair value accounting of the derivative financial instruments and debentures payable. Our operational performance remains unchanged. All other information included in our annual report on Form 10-K for the fiscal year ended December 31, 2013 has not been amended. Except for the matter described above, this amendment does not modify or update disclosures in the originally filed annual report on Form 10-K, or reflect events occurring after March 17, 2014, which is the date of the filing of the originally filed annual report on Form 10-K.
Amendment Flag	true