SIGNIFICANT ACCOUNTING POLICIES - Computation and Reconciliation of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net income (loss) as reported
Net income (loss) attributable to DMC Global Inc. stockholders, as reported	$ 26,259	$ 12,247	$ (202)
Adjustment of redeemable noncontrolling interest	(4,870)	1,937	(4,424)
Less: Undistributed net income available to participating securities	(305)	(198)	0
Numerator for basic net income (loss) per share:	21,084	13,986	(4,626)
Add: Undistributed net income allocated to participating securities	305	198	0
Less: Undistributed net income reallocated to participating securities	(305)	(198)	0
Numerator for diluted net income (loss) per share	$ 21,084	$ 13,986	$ (4,626)
Denominator:
Weighted average shares outstanding for basic net income (loss) per share (in shares)	19,504,542	19,360,677	17,610,711
Effect of dilutive securities (in shares)	13,840	8,488	0
Weighted average shares outstanding for diluted net income (loss) per share (in shares)	19,518,382	19,369,165	17,610,711
Net income (loss) per share attributable to DMC Global Inc. stockholders:
Basic (in dollars per share)	$ 1.08	$ 0.72	$ (0.26)
Diluted (in dollars per share)	$ 1.08	$ 0.72	$ (0.26)
Antidilutive securities excluded from earnings per share (in shares)	7,387