Document and Entity Information - shares |
3 Months Ended | |
|---|---|---|
Mar. 26, 2016 |
Apr. 15, 2016 |
|
| Document Information [Line Items] | ||
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Mar. 26, 2016 | |
| Document Fiscal Year Focus | 2016 | |
| Document Fiscal Period Focus | Q1 | |
| Trading Symbol | SAM | |
| Entity Registrant Name | BOSTON BEER CO INC | |
| Entity Central Index Key | 0000949870 | |
| Current Fiscal Year End Date | --12-26 | |
| Entity Filer Category | Large Accelerated Filer | |
| Common Class A | ||
| Document Information [Line Items] | ||
| Entity Common Stock, Shares Outstanding | 9,335,614 | |
| Common Class B | ||
| Document Information [Line Items] | ||
| Entity Common Stock, Shares Outstanding | 3,367,355 |