| Document And Entity Information | Mar. 24, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | QAD Inc. |
| Document, Type | 8-K |
| Document, Period End Date | Mar. 24, 2021 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 0-22823 |
| Entity, Tax Identification Number | 77-0105228 |
| Entity, Address, Address Line One | 100 Innovation Place |
| Entity, Address, City or Town | Santa Barbara |
| Entity, Address, State or Province | CA |
| Entity, Address, Postal Zip Code | 93108 |
| City Area Code | 805 |
| Local Phone Number | 566-6000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001036188 |
| ClassACommonStock0001ParValue Custom [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A Common Stock, $0.001 par value |
| Trading Symbol | QADA |
| Security Exchange Name | NASDAQ |
| ClassBCommonStock0001ParValue Custom [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class B Common Stock, $0.001 par value |
| Trading Symbol | QADB |
| Security Exchange Name | NASDAQ |
