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v3.19.3.a.u2

Dividends (Details) | May 01, 2018
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Dividends |
Common stock dividend declared, percentage of shares outstanding | 5.00%
Stock dividend, number of shares granted for each share outstanding | 0.05

X
- Definition The percentage of common stock declared in a stock dividend, as a percentage of outstanding shares. + References No definition available. + Details
Name: | dwsn_CommonStockDividendDeclaredStockDividendPercentageOfStockDeclared
Namespace Prefix: | dwsn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the ratio of number of shares of stock issued in a stock dividend to each share outstanding. + References No definition available. + Details
Name: | dwsn_StockDividendRatio
Namespace Prefix: | dwsn_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DividendsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration