Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 06, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Trading Symbol CLXT  
Entity Registrant Name CALYXT, INC.  
Entity Central Index Key 0001705843  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Common Stock, Shares Outstanding   32,866,100
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity File Number 001-38161  
Entity Tax Identification Number 271967997  
Entity Address, Address Line One 2800 Mount Ridge Road  
Entity Address, City or Town Roseville  
Entity Address, State or Province MN  
Entity Address, Postal Zip Code 55113  
City Area Code 651  
Local Phone Number 683-2807