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Advertising Costs | 12 Months Ended
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Dec. 31, 2016
Advertising Costs |
Advertising Costs | 11. Advertising Costs Advertising costs are charged to expense as incurred. Advertising costs for the years ended December 31, 2016 and 2015, the three months ended December 31, 2014 and the year ended September 31, 2014, respectively, totaled $372,000, $466,000, $62,000 and $223,000, respectively.

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- Definition The entire disclosure for reporting the Company's advertising expenses. + References No definition available. + Details
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Namespace Prefix: | dwsn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration