| Document and Entity Information | Mar. 14, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 14, 2021 |
| Entity Registrant Name | CALAMP CORP |
| Entity Central Index Key | 0000730255 |
| Entity Emerging Growth Company | false |
| Entity File Number | 0-12182 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 95-3647070 |
| Entity Address, Address Line One | 15635 Alton Parkway |
| Entity Address, Address Line Two | Suite 250 |
| Entity Address, City or Town | Irvine |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92618 |
| City Area Code | (949) |
| Local Phone Number | 600-5600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, $0.01 per share |
| Trading Symbol | CAMP |
| Security Exchange Name | NASDAQ |
