SIGNIFICANT ACCOUNTING POLICIES - Computation and Reconciliation of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income (loss) as reported
Net income (loss) attributable to DMC Global Inc. stockholders, as reported	$ 12,247	$ (202)	$ (1,412)
Adjustment of redeemable noncontrolling interest	1,937	(4,424)	0
Less: Undistributed net income available to participating securities	(198)	0	0
Numerator for basic net income (loss) per share:	13,986	(4,626)	(1,412)
Add: Undistributed net income allocated to participating securities	198	0	0
Less: Undistributed net income reallocated to participating securities	(198)	0	0
Numerator for diluted net income (loss) per share:	$ 13,986	$ (4,626)	$ (1,412)
Denominator:
Weighted average shares outstanding for basic net income (loss) per share (in shares)	19,360,677	17,610,711	14,790,296
Effect of dilutive securities (in shares)	8,488	0	0
Weighted average shares outstanding for diluted net income (loss) per share (in shares)	19,369,165	17,610,711	14,790,296
Net income (loss) per share attributable to DMC Global Inc. stockholders:
Basic (in dollars per share)	$ 0.72	$ (0.26)	$ (0.10)
Diluted (in dollars per share)	$ 0.72	$ (0.26)	$ (0.10)
Antidilutive securities excluded from earnings per share (in shares)	93,060