| Document and Entity Information | Dec. 07, 2020 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0000008146 |
| Document Type | 8-K |
| Document Period End Date | Dec. 7, 2020 |
| Entity Registrant Name | ASTRONOVA, INC. |
| Entity Incorporation State Country Code | RI |
| Entity File Number | 0-13200 |
| Entity Tax Identification Number | 05-0318215 |
| Entity Address, Address Line One | 600 East Greenwich Avenue |
| Entity Address, City or Town | West Warwick |
| Entity Address, State or Province | RI |
| Entity Address, Postal Zip Code | 02893 |
| City Area Code | (401) |
| Local Phone Number | 828-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.05 Par Value |
| Trading Symbol | ALOT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
