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SUPPLEMENTAL PURCHASE AGREEMENT TRANSACTION INFORMATION - Non-cash asset purchase items (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Asset Acquisition [Line Items] |  |  |  |
Deemed distribution of Breckenridge net assets not acquired | $ 2,329 |  | $ 2,329 | $ 0
Deemed contribution of Breckenridge net assets |  | $ (6,472) |  | (6,472)
Breckenridge |  |  |  |
Asset Acquisition [Line Items] |  |  |  |
Deemed distribution (contribution) of short-term investments |  |  | 1,000 |
Deemed distribution (contribution) of accounts receivable |  |  | 1,015 | (2,605)
Deemed distribution (contribution) of prepaids and other |  |  | 1 | (133)
Deemed distribution (contribution) of land and buildings |  |  | 514 | (4,726)
Deemed (distribution) contribution of accounts payable |  |  | (132) | 196
Deemed (distribution) contribution of accrued liabilities |  |  | (69) | 228
Deemed (distribution) contribution of deferred revenue |  |  |  | 568
Deemed distribution of Breckenridge net assets not acquired |  |  | $ 2,329 |
Deemed contribution of Breckenridge net assets |  |  |  | $ (6,472)

X
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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X
- Definition Amount of deemed distribution or contribution of accounts payable. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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X
- Definition Amount of deemed distribution or contribution of accounts receivable. + References No definition available. + Details
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X
- Definition Amount of deemed distribution or contribution of accrued liabilities. + References No definition available. + Details
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- Definition Amount of deemed distribution or contribution of deferred revenue. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Amount of deemed distribution or contribution of land and buildings. + References No definition available. + Details
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Namespace Prefix: | dwsn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of deemed distribution or contribution of prepaids and other. + References No definition available. + Details
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Namespace Prefix: | dwsn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of deemed distribution or contribution of short-term investments. + References No definition available. + Details
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Namespace Prefix: | dwsn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of deemed distribution of net assets not acquired. + References No definition available. + Details
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Namespace Prefix: | dwsn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AssetAcquisitionLineItems
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |