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SELECTED QUARTERLY FINANCIAL DATA - Narrative (Details) (Segment Sold [Member])
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Consolidated assets [Member]
    
Concentration Risk [Line Items]    
Concentration risk percentage (less than) 5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AssetsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= boom_SegmentSoldMember		 5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AssetsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= boom_SegmentSoldMember
Consolidated sales [Member]
    
Concentration Risk [Line Items]    
Concentration risk percentage (less than) 5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= boom_SegmentSoldMember		 5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= boom_SegmentSoldMember
Consolidated operating income [Member]
    
Concentration Risk [Line Items]    
Concentration risk percentage (less than) 5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_OperatingIncomeLossMember
/ us-gaap_ConcentrationRiskByTypeAxis
= boom_SegmentSoldMember		 5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_OperatingIncomeLossMember
/ us-gaap_ConcentrationRiskByTypeAxis
= boom_SegmentSoldMember