| Document and Entity Information | Jan. 14, 2025 |
| Cover [Abstract] | |
| Entity Registrant Name | BIG 5 SPORTING GOODS Corp |
| Amendment Flag | false |
| Entity Central Index Key | 0001156388 |
| Document Type | 8-K |
| Document Period End Date | Jan. 14, 2025 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 000-49850 |
| Entity Tax Identification Number | 95-4388794 |
| Entity Address, Address Line One | 2525 East El Segundo Boulevard |
| Entity Address, City or Town | El Segundo |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90245 |
| City Area Code | (310) |
| Local Phone Number | 536-0611 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.01 per share |
| Trading Symbol | BGFV |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
