v3.22.2.2
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2022
Nov. 10, 2022
Cover [Abstract]    
Entity Registrant Name ACORDA THERAPEUTICS, INC.  
Entity Central Index Key 0001008848  
Document Type 10-Q  
Document Period End Date Sep. 30, 2022  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Document Quarterly Report true  
Document Transition Report false  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q3  
Trading Symbol ACOR  
Title of each class Common Stock $0.001 par value per share  
Name of each exchange on which registered NASDAQ  
Entity Common Stock, Shares Outstanding   24,337,814
Entity File Number 001-31938  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 13-3831168  
Entity Address, Address Line One 2 Blue Hill Plaza  
Entity Address, Address Line Two 3rd Floor  
Entity Address, City or Town Pearl River  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10965  
City Area Code 914  
Local Phone Number 347-4300