SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
SIGNIFICANT ACCOUNTING POLICIES (Policies)	Sep. 30, 2017
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the accounts of DMC Global Inc. ("DMC") and its controlled subsidiaries. Only subsidiaries in which controlling interests are maintained are consolidated. All significant intercompany accounts, profits, and transactions have been eliminated in consolidation.
Income Taxes	Income Taxes The effective tax rate for each of the periods reported differs from the U.S. statutory rate due primarily to variation in contribution to consolidated pre-tax income from each jurisdiction for the respective periods, differences between the U.S. and foreign tax rates (which range from 20% to 35%) on earnings that have been permanently reinvested and changes to valuation allowances on our deferred tax assets. We recognize deferred tax assets and liabilities for the expected future income tax consequences of temporary differences between the financial reporting and tax bases of assets and liabilities. Any effects of changes in income tax rates or tax laws are included in the provision for income taxes in the period of enactment. The deferred income tax impact of tax credits are recognized as an immediate adjustment to income tax expense. We recognize deferred tax assets for the expected future effects of all deductible temporary differences to the extent we believe these assets will more likely than not be realized. We record a valuation allowance when, based on current circumstances, it is more likely than not that all or a portion of the deferred tax assets will not be realized. In making such determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies, recent financial operations and their associated valuation allowances, if any. We recognize the tax benefits from uncertain tax positions only when it is more likely than not, based on the technical merits of the position; the tax position will be sustained upon examination, including the resolution of any related appeals or litigation. The tax benefits recognized in the consolidated financial statements from such a position are measured as the largest benefit that is more likely than not of being realized upon ultimate resolution. We recognize interest and penalties related to uncertain tax positions in operating expense. In the U.S., tax audits for the years 2012 through 2015 were closed during the second quarter 2017, and no adjustments to the Company's tax provisions were proposed. In Germany, tax audits are currently in progress for the years 2011 through 2014. Our tax provisions reflect our best estimate of state, local, federal, and foreign taxes. However, the outcome of tax audits cannot be predicted with certainty. If any issues addressed in the Company’s tax audits are resolved in a manner not consistent with our expectations, the Company could be required to adjust its provision for income taxes in the period such resolution occurs.
Earnings Per Share	Earnings Per Share Unvested awards of share-based payments with rights to receive dividends or dividend equivalents are considered participating securities for purposes of calculating earnings per share (“EPS”) during periods in which we have net income and require the use of the two class method for calculating EPS. Under this method, a portion of net income is allocated to these participating securities and therefore is excluded from the calculation of EPS allocated to common stock, as shown in the table below.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We are required to use an established hierarchy for fair value measurements based upon the inputs to the valuation and the degree to which they are observable or not observable in the market. The three levels in the hierarchy are as follows: •Level 1 — Inputs to the valuation based upon quoted prices (unadjusted) for identical assets or liabilities in active markets that are accessible as of the measurement date. •Level 2 — Inputs to the valuation include quoted prices in either markets that are not active, or in active markets for similar assets or liabilities, inputs other than quoted prices that are observable, and inputs that are derived principally from or corroborated by observable market data. •Level 3 — Inputs to the valuation that are unobservable inputs for the asset or liability. The highest priority is assigned to Level 1 inputs and the lowest priority to Level 3 inputs. The carrying value of cash and cash equivalents, trade accounts receivable and payables, accrued expenses and lines of credit approximate their fair value. Our foreign currency forward contracts are valued using quoted market prices or are determined using a yield curve model based on current market rates. As a result, we intend to classify these investments as Level 2 in the fair value hierarchy.
Recently Adopted Accounting Standards and Recent Accounting Pronouncements	Recently Adopted Accounting Standards In July 2015, the Financial Accounting Standards Board ("FASB") issued an accounting standards update ("ASU") to change the measurement of inventory from lower of cost or market to lower of cost and net realizable value. This pronouncement is effective for reporting periods beginning after December 15, 2016, and the Company has adopted it as of the first quarter of 2017. The adoption of this standard did not have a material impact on the Company's consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment,” to simplify the method of measuring a goodwill impairment charge in the event a reporting unit’s carrying amount exceeds its fair value. In those circumstances, the new standard requires the Company to recognize an impairment charge for the amount by which the carrying amount of the reporting unit exceeds its fair value. The Company adopted this standard during the third quarter of 2017 and applied it in the test for goodwill impairment described in Note 4. Recent Accounting Pronouncements In October 2016, the FASB issued an ASU which removes the prohibition against the immediate recognition of the current and deferred income tax effects of intra-entity transfers of assets other than inventory. This ASU is effective for public business entities in fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company is in the process of evaluating the impact of adopting this standard on its consolidated financial statements. In February 2016, the FASB issued an ASU which amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. This ASU will be effective beginning in the first quarter of 2019. Early adoption is permitted. The new leases standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. The Company is currently evaluating the impact of adopting this standard on its consolidated financial statements. In May 2014, the FASB issued an ASU to clarify the principles of recognizing revenue and to develop a common revenue standard and disclosure requirements for U.S. GAAP and IFRS. The pronouncement is effective for reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. The standard can be adopted using either of two methods: (1) retrospective application to each prior reporting period presented with the option to elect certain practical expedients, as defined within the standard ("full retrospective") or (2) retrospective application with the cumulative effect of adoption recognized at the date of initial application and providing certain additional disclosures, as defined within the standard ("modified retrospective"). Management currently plans to adopt the ASU for the quarter ended March 31, 2018, as required by the standard, and plans to use the modified retrospective approach. Currently, using internal resources, management is analyzing contracts from the NobelClad and DynaEnergetics segments to determine the technical accounting conclusions and the impact on business processes and systems of the new revenue standard. In our NobelClad business, contracts are often for unique projects, but the vast majority of contracts contain standard terms and conditions. In our DynaEnergetics business, we sell a range of products to a wide variety of customers, but the contracts also often contain similar terms and conditions. We have reviewed contracts representing a majority of NobelClad's and DynaEnergetics' revenue for the year ended December 31, 2016 and have preliminarily concluded that applying the new standard to those contracts would not have a material impact on our financial statements. The Company is continuing to evaluate the impacts of our pending adoption, and our preliminary assessments are subject to change.
Inventories	Inventories are stated at the lower of cost (first-in, first-out) and net realizable value. Cost elements included in inventory are material, labor, freight, subcontract costs, and manufacturing overhead. As necessary, we record provisions and maintain reserves for excess, slow moving and obsolete inventory. To determine reserve amounts, we regularly review inventory quantities on hand and values, and compare them to estimates of future product demand, market conditions, production requirements and technological developments.
Customer Advances	On occasion, we require customers to make advance payments prior to the shipment of goods in order to help finance our inventory investment on large orders or to keep customers’ credit limits at acceptable levels.

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.