XML 14 R1.htm IDEA: XBRL DOCUMENT v3.22.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2022
May 02, 2022
Cover [Abstract]    
Entity Registrant Name CYCLERION THERAPEUTICS, INC.  
Document Type 10-Q  
Document Period End Date Mar. 31, 2022  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   43,448,360
Entity Central Index Key 0001755237  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Entity Tax Identification Number 83-1895370  
Entity File Number 001-38787  
Entity Incorporation, State or Country Code MA  
Entity Address, Address Line One 245 First Street  
Entity Address, Address Line Two 18th Floor  
Entity Address, City or Town Cambridge  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 02142  
City Area Code 857  
Local Phone Number 327-8778  
Title of 12(b) Security Common Stock, no par value  
Trading Symbol CYCN  
Security Exchange Name NASDAQ