v3.26.1
Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Jan. 03, 2026
Feb. 27, 2026
Jun. 27, 2025
Entity Registrant Name SUNOPTA INC.    
Entity Shell Company false    
Entity Current Reporting Status Yes    
Entity Emerging Growth Company false    
Entity Small Business false    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2026    
Amendment Flag true    
Document Period End Date Jan. 03, 2026    
Document Type 10-K/A    
Entity Common Stock, Shares Outstanding   118,358,568  
Entity Public Float     $ 563.8
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Filer Category Accelerated Filer    
Current Fiscal Year End Date --01-03    
Entity Central Index Key 0000351834    
Entity File Number 001-34198    
Entity Address, Address Line One 7078 Shady Oak Road    
Entity Address, City or Town Eden Prairie    
Entity Address, State or Province MN    
Entity Address, Postal Zip Code 55344    
City Area Code 952    
Local Phone Number 820-2518    
Entity Interactive Data Current Yes    
Entity Tax Identification Number 00-0000000    
Entity Incorporation, State or Country Code Z4    
Document Transition Report false    
Document Annual Report true    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Documents Incorporated by Reference [Text Block]

Documents Incorporated by Reference: None

   
Amendment Description                 This Amendment No. 1 on Form 10-K/A (the "Amendment") amends the Annual Report on Form 10-K of SunOpta Inc. ("we", "us", "our", or the "Company") for the fiscal year ended January 3, 2026, filed with the Securities and Exchange Commission (the "SEC") on March 4, 2026 (the "Original Form 10-K"). We are filing this Amendment to include the information required by Part III, which was omitted from the Original Form 10-K in reliance on General Instruction G(3) to Form 10-K, since we will not file an annual general meeting definitive proxy statement within 120 days after our fiscal year ended January 3, 2026.                 This Amendment amends and restates in their entirety Items 10, 11, 12, 13 and 14 of Part III of the Original Form 10-K and Item 15 of Part IV of the Original Form 10-K and includes certain exhibits as noted therein. The cover page of the Original Form 10-K is also amended to delete the reference to the incorporation by reference.                 Except as described above, no other changes have been made to the Original Form 10-K, and this Amendment does not modify, amend or update in any way any of the financial or other information contained in the Original Form 10-K. This Amendment does not reflect events occurring after the date of the filing of the Original Form 10-K. Accordingly, this Amendment should be read in conjunction with the Original Form 10-K and with our filings with the SEC subsequent to the filing of our Original Form 10-K.                 Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), this Amendment also contains certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, which are attached hereto. Because no financial statements have been included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4 and 5 of the certifications have been omitted. Terms used but not defined herein are as defined in our Original Form 10-K.                 On February 6, 2026, we entered into an Arrangement Agreement (the "Arrangement Agreement") with Pegasus BidCo B.V. ("Parent"), a private company with limited liability incorporated under the laws of the Netherlands, and 2786694 Alberta Ltd., a corporation formed under the laws of the Province of Alberta and a wholly-owned subsidiary of Parent ("Purchaser" and together with Parent, "Refresco"), pursuant to which, on the terms and subject to the conditions set forth therein, Purchaser has agreed to acquire all of our issued and outstanding common shares, including the common shares issuable on the exchange of our issued and outstanding shares of Series B-1 Preferred Stock, by way of a court-approved statutory plan of arrangement under the Canada Business Corporations Act (the "Arrangement"). Pursuant to the Arrangement, at the closing, each of our issued and outstanding common shares will be transferred to Purchaser for consideration of $6.50 per share in cash, less applicable withholdings. The Arrangement is expected to close in the second quarter of 2026, subject to satisfaction or waiver of the closing conditions. Upon completion of the transaction, we will become a wholly-owned subsidiary of Refresco, and our common shares will be delisted from The Nasdaq Stock Market and the Toronto Stock Exchange.    
The Nasdaq Stock Market | Common Shares      
Trading Symbol STKL    
Security Exchange Name NASDAQ    
Title of 12(b) Security Common Shares    
The Toronto Stock Exchange | Common Shares      
Trading Symbol SOY    
Title of 12(b) Security Common Shares