| Document And Entity Information | Feb. 04, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | DSP GROUP, INC. |
| Document, Type | 8-K |
| Document, Period End Date | Feb. 4, 2021 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 1-35256 |
| Entity, Tax Identification Number | 94-2683643 |
| Entity, Address, Address Line One | 2055 Gateway Place, #480 |
| Entity, Address, City or Town | San Jose |
| Entity, Address, State or Province | CA |
| Entity, Address, Postal Zip Code | 95110 |
| City Area Code | 972 |
| Local Phone Number | 952-9696 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | DSPG |
| Security Exchange Name | NASDAQ |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0000915778 |
