| Cover | Feb. 18, 2021 | Dec. 10, 2020 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Feb. 18, 2021 | |
| 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 |
