| Cover | Aug. 14, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 14, 2023 |
| Entity File Number | 001-38907 |
| Entity Registrant Name | Sonim Technologies, Inc. |
| Entity Central Index Key | 0001178697 |
| Entity Tax Identification Number | 94-3336783 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 4445 Eastgate Mall |
| Entity Address, Address Line Two | Suite 200 |
| Entity Address, City or Town | San Diego |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92121 |
| City Area Code | (650) |
| Local Phone Number | 378-8100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | SONM |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
