Cover |
6 Months Ended |
|---|---|
Jun. 30, 2026 | |
| Entity Addresses [Line Items] | |
| Document Type | S-1 |
| Amendment Flag | false |
| Entity Registrant Name | BIOATLA, INC. |
| Entity Central Index Key | 0001826892 |
| Entity Address, Address Line One | 11085 Torreyana Road |
| Entity Address, City or Town | San Diego |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92121 |
| City Area Code | 858 |
| Local Phone Number | 558-0708 |
| Entity Filer Category | Non-accelerated Filer |
| Entity Small Business | true |
| Entity Emerging Growth Company | false |
| Business Contact [Member] | |
| Entity Addresses [Line Items] | |
| Entity Address, Address Line One | 11085 Torreyana Road |
| Entity Address, City or Town | San Diego |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92121 |
| City Area Code | 858 |
| Local Phone Number | 558-0708 |
| Contact Personnel Name | Jay M. Short, Ph.D. |