v3.25.2
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2025
Aug. 04, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 000-56294  
Entity Registrant Name THE CANNABIST COMPANY HOLDINGS INC.  
Entity Incorporation, State or Country Code A1  
Entity Tax Identification Number 98-1488978  
Entity Address, Address Line One 321 Billerica Rd., Suite 204  
Entity Address, City or Town Chelmsford  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 01824  
City Area Code 978  
Local Phone Number 910-1486  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   491,745,341
Entity Central Index Key 0001776738  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2