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INCOME TAXES (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Current:      
U.S. federal     $ 3,947,400us-gaap_CurrentFederalTaxExpenseBenefit
Foreign 1,191,079us-gaap_CurrentForeignTaxExpenseBenefit 949,207us-gaap_CurrentForeignTaxExpenseBenefit 5,313,874us-gaap_CurrentForeignTaxExpenseBenefit
State and local (142,274)us-gaap_CurrentStateAndLocalTaxExpenseBenefit 205,997us-gaap_CurrentStateAndLocalTaxExpenseBenefit 264,269us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Current income tax expense (benefit) 1,048,805us-gaap_CurrentIncomeTaxExpenseBenefit 1,155,204us-gaap_CurrentIncomeTaxExpenseBenefit 9,525,543us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred expense (benefit) (5,745,239)us-gaap_DeferredIncomeTaxExpenseBenefit (3,308,713)us-gaap_DeferredIncomeTaxExpenseBenefit 359,535us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax expense (benefit): (4,696,434)us-gaap_IncomeTaxExpenseBenefit (2,153,509)us-gaap_IncomeTaxExpenseBenefit 9,885,078us-gaap_IncomeTaxExpenseBenefit
Components of income before income tax attributable to Operations      
Components of income (loss) before income tax attributable to domestic operations (17,774,883)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (12,635,002)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic 6,018,971us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Components of income (loss) before income tax attributable to foreign operations 3,550,119us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 4,165,452us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 19,537,986us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Federal income tax rate (as a percent) (34.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Reconciliation of income tax expense (provision)      
Computed expected tax expense (4,836,420)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate (2,879,647)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate 8,944,935us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Increase (decrease) in income taxes resulting from:      
Reduction in deferred assets (281,432)dwsn_IncomeTaxReconciliationDeferredTaxRateDifferential    
Nondeductible expenses and other 515,923dwsn_IncomeTaxReconciliationNondeductibleExpenseAndOther 590,180dwsn_IncomeTaxReconciliationNondeductibleExpenseAndOther 768,652dwsn_IncomeTaxReconciliationNondeductibleExpenseAndOther
State and local taxes, net of federal benefit (94,505)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes 135,958us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes 171,491us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Income tax expense (benefit): (4,696,434)us-gaap_IncomeTaxExpenseBenefit (2,153,509)us-gaap_IncomeTaxExpenseBenefit 9,885,078us-gaap_IncomeTaxExpenseBenefit
Deferred tax assets      
Foreign tax credits 1,611,329us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign 244,898us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign  
Net operating loss carry forwards 3,940,285us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 61,139us-gaap_DeferredTaxAssetsOperatingLossCarryforwards  
Other 199,821us-gaap_DeferredTaxAssetsOther 88,911us-gaap_DeferredTaxAssetsOther  
Total deferred tax assets 5,751,435us-gaap_DeferredTaxAssetsNet 394,948us-gaap_DeferredTaxAssetsNet  
Deferred tax liability      
Property, equipment, and intangible asset (4,596,935)dwsn_DeferredTaxLiabilitiesPropertyEquipmentAndIntangibleAsset (4,985,687)dwsn_DeferredTaxLiabilitiesPropertyEquipmentAndIntangibleAsset  
Net deferred tax liabilities 1,154,500us-gaap_DeferredTaxAssetsLiabilitiesNet (4,590,739)us-gaap_DeferredTaxAssetsLiabilitiesNet  
Classification of net deferred tax components      
Noncurrent assets 1,154,500us-gaap_DeferredTaxAssetsNetNoncurrent    
Noncurrent (liabilities)   (4,590,739)us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent  
Net deferred tax liabilities 1,154,500us-gaap_DeferredTaxAssetsLiabilitiesNet (4,590,739)us-gaap_DeferredTaxAssetsLiabilitiesNet  
Net operating loss carry forwards for U.S. federal income tax purposes 12,400,000us-gaap_OperatingLossCarryforwards    
Unrecognized tax benefits $ 0us-gaap_UnrecognizedTaxBenefits $ 0us-gaap_UnrecognizedTaxBenefits