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Cover Page - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2024
Feb. 21, 2025
Jun. 28, 2024
Document Information [Line Items]      
Document Annual Report true    
Document Transition Report false    
Document Type 10-K    
Document Period End Date Dec. 28, 2024    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Registrant Name THE BOSTON BEER COMPANY, INC.    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Small Business false    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Emerging Growth Company false    
Entity File Number 1-14092    
Entity Incorporation, State or Country Code MA    
Entity Tax Identification Number 04-3284048    
Entity Address, Address Line One One Design Center Place, Suite 850    
Entity Address, City or Town Boston    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 02210    
City Area Code 617    
Local Phone Number 368-5000    
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000949870    
Current Fiscal Year End Date --12-28    
Trading Symbol SAM    
Security Exchange Name NYSE    
Title of 12(b) Security Class A Common Stock    
Document Financial Statement Error Correction [Flag] false    
Entity Public Float     $ 2,737,760
Documents Incorporated by Reference

Certain parts of the registrant’s definitive Proxy Statement for its 2025 Annual Meeting to be held on May 14, 2025 are incorporated by reference into Part III of this report.

    
Auditor Name Deloitte & Touche LLP    
Auditor Location Boston, Massachusetts    
Auditor Firm ID 34    
Auditor Opinion [Text Block]

Opinion on the Financial Statements

 

We have audited the accompanying consolidated balance sheets of The Boston Beer Company, Inc. and subsidiaries (the "Company") as of December 28, 2024 and December 30, 2023, the related consolidated statements of comprehensive income, stockholders’ equity, and cash flows, for each of the three years in the period ended December 28, 2024, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 28, 2024 and December 30, 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 28, 2024, in conformity with accounting principles generally accepted in the United States of America.
 

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 28, 2024, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 25, 2025, expressed an unqualified opinion on the Company's internal control over financial reporting.
 

    
Common Class A      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   9,175,801  
Common Class B      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   2,068,000