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COSTS, BILLINGS, AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Costs incurred on uncompleted contracts
Costs incurred on uncompleted contracts and estimated earnings	$ 2,326,653dwsn_CostsIncurredOnUncompletedContractsAndEstimatedEarnings	$ 2,476,716dwsn_CostsIncurredOnUncompletedContractsAndEstimatedEarnings
Less billings to date	(4,737,861)dwsn_BillingsToDate	(816,989)dwsn_BillingsToDate
Unbilled contracts receivable	(2,411,208)us-gaap_UnbilledContractsReceivable	1,659,727us-gaap_UnbilledContractsReceivable
Costs in excess of billings on uncompleted contracts
Cost and estimated earnings in excess of billings on uncompleted contracts	2,039,894us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear	2,312,947us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear
Billings in excess of costs and estimated earnings on uncompleted contracts	(4,451,102)us-gaap_BillingsInExcessOfCostCurrent	(653,220)us-gaap_BillingsInExcessOfCostCurrent
Unbilled contracts receivable	$ (2,411,208)us-gaap_UnbilledContractsReceivable	$ 1,659,727us-gaap_UnbilledContractsReceivable

X

- Definition

Represents the billings to date on uncompleted contracts accounted for under the percentage-of-completion method.

+ References

No definition available.

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- Definition

Represents the costs incurred on uncompleted contracts and estimated earnings, as of the balance sheet date.

+ References

No definition available.

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- Definition

Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 35

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6802688&loc=d3e57788-111642



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- Definition

Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings which is expected to be collected within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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