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SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION - Accounts Receivable (Details) - USD ($) $ in Millions	Sep. 30, 2025	Jan. 01, 2025	Sep. 30, 2024	Jan. 01, 2024
SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION
Accounts receivable related to contracts with customers	$ 2.1	$ 9.9	$ 2.8	$ 12.5

X

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, related to contracts with customers, classified as current.

+ References

No definition available.

+ Details

Name:	dwsn_AccountsReceivableContractWithCustomersAfterAllowanceForCreditLossCurrent
Namespace Prefix:	dwsn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_BalanceSheetRelatedDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration