| Document and Entity Information | Jul. 27, 2022 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001814140 |
| Document Type | 8-K |
| Document Period End Date | Jul. 27, 2022 |
| Entity Registrant Name | BROOKLINE CAPITAL ACQUISITION CORP. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-39488 |
| Entity Tax Identification Number | 85-1260244 |
| Entity Address, Address Line One | 280 Park Avenue |
| Entity Address, Address Line Two | Suite 43W |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10017 |
| City Area Code | (646) |
| Local Phone Number | 603-6716 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Units Each Consisting Of One Share Of Common Stock One Half Of One Redeemable Warrant 3 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Units, each consisting of one share of Common Stock, one-half of one Redeemable Warrant |
| Trading Symbol | BCACU |
| Security Exchange Name | NASDAQ |
| Common Stock Par Value 0.0001 Per Share 1 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, par value $0.0001 per share |
| Trading Symbol | BCAC |
| Security Exchange Name | NASDAQ |
| Warrants Each Whole Warrant Exercisable For One Share Of Common Stock For 11.50 Per Share 2 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Warrants, each whole warrant exercisable for one share of Common Stock for $11.50 per share |
| Trading Symbol | BCACW |
| Security Exchange Name | NASDAQ |
