| Cover Page | Feb. 24, 2020 |
| Cover page. | |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001736946 |
| Entity Emerging Growth Company | true |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Pre-commencement Issuer Tender Offer | false |
| Pre-commencement Tender Offer | false |
| Soliciting Material | false |
| Written Communications | false |
| City Area Code | 408 |
| Entity Tax Identification Number | 38-4061754 |
| Document Type | 8-K |
| Document Period End Date | Feb. 24, 2020 |
| Entity Registrant Name | ARLO TECHNOLOGIES, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38618 |
| Entity Address, Address Line One | 3030 Orchard Parkway |
| Entity Address, City or Town | San Jose, |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 95134 |
| Local Phone Number | 890-3900 |
| Trading Symbol | ARLO |
| Security Exchange Name | NYSE |
| Amendment Flag | false |
