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v3.25.4

Organization and Nature of Operations (Details) $ / shares in Units, $ in Millions |  | 12 Months Ended
--- | --- | ---
Sep. 15, 2025 USD ($) $ / shares shares | Dec. 31, 2025 vote store state shares
Product Information [Line Items] |  |
Number of Stores | store |  | 181
Number of states | state |  | 7
Recapitalized ownership (in units) |  | 43,079,227
Black Rock OpCo | Affiliate Of Co-Founders | LLC Units |  |
Product Information [Line Items] |  |
Sale of stock (in shares) | 3,118,938 |
Public offering price | $ / shares | $ 20.00 |
Net proceeds from IPO | $ | $ 62.4 |
Black Rock OpCo | LLC Units held by Black Rock Coffee Bar, Inc. | LLC Units |  |
Product Information [Line Items] |  |
Sale of stock (in shares) | 3,857,642 |
Net proceeds from IPO | $ | $ 71.8 |
Continuing Equity Owners | LLC Units |  |
Product Information [Line Items] |  |
Sale of stock (in shares) | 13,054,122 |
Net proceeds from IPO | $ | $ 242.8 |
Class A Common stock |  |
Product Information [Line Items] |  |
Number of votes per share | vote |  | 1
Class B Common stock |  |
Product Information [Line Items] |  |
Number of votes per share | vote |  | 1
Class C Common stock |  |
Product Information [Line Items] |  |
Number of votes per share | vote |  | 10
Share ownership threshold |  | 33.00%
IPO |  |
Product Information [Line Items] |  |
Sale of stock (in shares) | 16,911,764 |
Public offering price | $ / shares | $ 20.00 |
Net proceeds from IPO | $ | $ 306.5 |
Over-Allotment Option |  |
Product Information [Line Items] |  |
Sale of stock (in shares) | 2,205,882 |

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