SIGNIFICANT ACCOUNTING POLICIES - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share Reconciliation [Abstract]
Net income (loss) attributable to DMC Global Inc. stockholders, as reported	$ 909	$ (3,288)
Adjustment of redeemable noncontrolling interest	(1,138)	(5,717)
Less: Undistributed net income available to participating securities	0	0
Numerator for basic net loss per share:	(229)	(9,005)
Add: Undistributed net income allocated to participating securities	0	0
Less: Undistributed net income reallocated to participating securities	0	0
Numerator for diluted net loss per share:	$ (229)	$ (9,005)
Denominator:
Weighted average shares outstanding for basic net loss per share (in shares)	19,462,636	19,301,126
Effect of dilutive securities (in shares)	0	0
Weighted average shares outstanding for diluted net loss per share (in shares)	19,462,636	19,301,126
Net loss per share attributable to DMC Global Inc. stockholders
Basic (in dollars per share)	$ (0.01)	$ (0.47)
Diluted (in dollars per share)	$ (0.01)	$ (0.47)