SIGNIFICANT ACCOUNTING POLICIES - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share Reconciliation [Abstract]
Net income attributable to DMC Global Inc. stockholders, as reported	$ 5,552	$ 1,724	$ 2,264	$ 2,156
Less: Adjustment of redeemable noncontrolling interest	(1,535)	0	(7,252)	0
Less: Undistributed net income available to participating securities	(60)	(17)	0	(21)
Numerator for basic net income (loss) per share:	3,957	1,707	(4,988)	2,135
Add: Undistributed net income allocated to participating securities	60	17	0	21
Less: Undistributed net income reallocated to participating securities	(60)	(17)	0	(21)
Numerator for diluted net income (loss) per share:	$ 3,957	$ 1,707	$ (4,988)	$ 2,135
Denominator:
Weighted average shares outstanding for basic net income (loss) per share (in shares)	19,374,714	17,554,809	19,338,049	16,495,685
Effect of dilutive securities (in shares)	22	13,635	0	11,815
Weighted average shares outstanding for diluted net income (loss) per share (in shares)	19,374,736	17,568,444	19,338,049	16,507,500
Net income (loss) per share attributable to DMC Global Inc. stockholders
Basic (in dollars per share)	$ 0.20	$ 0.10	$ (0.26)	$ 0.13
Diluted (in dollars per share)	$ 0.20	$ 0.10	$ (0.26)	$ 0.13
Anti-dilutive securities (in shares)	100,855		99,217