XML 31 R1.htm IDEA: XBRL DOCUMENT v3.21.1
Document and Entity Information
 12 Months Ended
Dec. 31, 2020
shares
Document Information [Line Items]  
Entity Central Index Key 0001375877
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Shell Company Report false
Document Period End Date Dec. 31, 2020
Entity File Number 001-33107
Entity Registrant Name CANADIAN SOLAR INC.
Entity Incorporation, State or Country Code A1
Entity Address, Address Line One 545 Speedvale Avenue West
Entity Address, City or Town Guelph, Ontario
Entity Address, Country CA
Entity Address, Postal Zip Code N1K 1E6
Amendment Flag false
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
Document Accounting Standard U.S. GAAP
Entity Shell Company false
Entity Common Stock, Shares Outstanding 59,820,384
Document Fiscal Year Focus 2020
Document Fiscal Period Focus FY
ICFR Auditor Attestation Flag true
Business Contact  
Document Information [Line Items]  
Entity Address, Address Line One 545 Speedvale Avenue West
Entity Address, City or Town Guelph, Ontario
Entity Address, Country CA
Entity Address, Postal Zip Code N1K 1E6
Contact Personnel Name Huifeng Chang
City Area Code 1-519
Local Phone Number 837-1881