| Cover | Jul. 28, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jul. 28, 2020 |
| Entity Registrant Name | DMC Global Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 0-8328 |
| Entity Tax Identification Number | 84-0608431 |
| Entity Address, Address Line One | 11800 Ridge Parkway |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | Broomfield |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80021 |
| City Area Code | 303 |
| Local Phone Number | 665-5700 |
| Title of 12(b) Security | Common Stock, $0.05 Par Value |
| Trading Symbol | BOOM |
| 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 | 0000034067 |
| Amendment Flag | false |
