SIGNIFICANT ACCOUNTING POLICIES - Computation and Reconciliation of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net income (loss) as reported
Net (loss) income attributable to DMC Global Inc. stockholders, as reported	$ (94,452)	$ 26,259	$ 12,247
Adjustment of redeemable noncontrolling interest	(64,260)	(4,870)	1,937
Less: Deemed dividend	(2,500)	0	0
Less: Undistributed net income available to participating securities	0	(305)	(198)
Numerator for basic net (loss) income per share:	(161,212)	21,084	13,986
Add: Undistributed net income allocated to participating securities	0	305	198
Less: Undistributed net income reallocated to participating securities	0	(305)	(198)
Numerator for diluted net (loss) income per share:	$ (161,212)	$ 21,084	$ 13,986
Denominator:
Weighted average shares outstanding for basic net (loss) income per share (in shares)	19,667,673	19,504,542	19,360,677
Effect of dilutive securities (in shares)	0	13,840	8,488
Weighted average shares outstanding for diluted net (loss) income per share (in shares)	19,667,673	19,518,382	19,369,165
Net (loss) income per share:
Basic (in dollars per share)	$ (8.20)	$ 1.08	$ 0.72
Diluted (in dollars per share)	$ (8.20)	$ 1.08	$ 0.72