Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2023	Mar. 27, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K/A
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Document Period End Date	Dec. 31, 2023
Entity File Number	001-31938
Entity Registrant Name	ACORDA THERAPEUTICS, INC.
Entity Central Index Key	0001008848
Amendment Flag	true
Amendment Description	Acorda Therapeutics, Inc. (the “Company”) is filing this Amendment No. 1 (this “Form 10-K Amendment”) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2023 that was filed with the Securities and Exchange Commission (“SEC”) on April 1, 2024 (the “Original Form 10-K”) for the sole purpose of including certain of the information required by Part III of Form 10-K because it will not file a definitive proxy statement containing this information within 120 days after the end of the fiscal year covered by the Original Form 10-K. As required by Rule 12b-15, in connection with this Form 10-K Amendment, the Company’s Principal Executive Officer and Principal Financial Officer are providing Rule 13a-14(a) certifications included herein. This Form 10-K Amendment (i) amends and restates in their entirety Items 10, 11, 12, 13, and 14 of Part III of the Original Form 10-K and (ii) deletes the reference on the cover of the Original Form 10-K to the incorporation by reference of certain information from our proxy statement into Part III of the Original Form 10-K. Except as described above, this Form 10-K Amendment does not modify or update the disclosures in, or exhibits to, the Original Form 10-K or update the Original Form 10-K to reflect events occurring after the date of such filing. Accordingly, this Form 10-K Amendment should be read in connection with our Original Form 10-K and with our filings with the SEC subsequent to the filing of our Original Form 10-K.
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	2 Blue Hill Plaza, 3rd Floor
Entity Address, City or Town	Pearl River
Entity Address, State or Province	NY
Entity Tax Identification Number	13-3831168
Entity Address, Postal Zip Code	10965
City Area Code	914
Local Phone Number	347-4300
Title of 12(b) Security	Common Stock $0.001 par value per share
Trading Symbol	ACORQ
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
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 16,055,406
Entity Common Stock, Shares Outstanding		1,242,098
Document Annual Report	true
Document Transition Report	false
Documents Incorporated by Reference [Text Block]	DOCUMENTS INCORPORATED BY REFERENCE None.

Acorda Therapeutics, Inc. 10-K/A