XML 64 R50.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Dividends (Details) | May 01, 2018
--- | ---
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

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