| Cover | Aug. 29, 2019 |
| Cover page. | |
| Document Type | 8-K |
| Document Period End Date | Aug. 29, 2019 |
| Entity Registrant Name | ZAGG INC |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-34528 |
| Entity Tax Identification Number | 20-2559624 |
| Entity Address, Address Line One | 910 West Legacy Center Way |
| Entity Address, Address Line Two | Suite 500 |
| Entity Address, City or Town | Midvale |
| Entity Address, State or Province | UT |
| Entity Address, Postal Zip Code | 84047 |
| City Area Code | 801 |
| Local Phone Number | 263-0699 |
| Title of 12(b) Security | Common Stock, $.001 par value |
| Trading Symbol | ZAGG |
| Security Exchange Name | NASDAQ |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001296205 |
| Amendment Flag | false |
