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Note 12 - Property and Equipment, Accrued Expenses, Other Current Liabilities, and Other Liabilities (Details Textual) | 3 Months Ended | 39 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2022
Number of Vessels | 138 | 135 |
Number of Vessels, Held for Sale | 12 | 18 | 85

X
- Definition The number of vessels. + References No definition available. + Details
Name: | tdw_NumberOfVessels
Namespace Prefix: | tdw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of vessels classified as held for sale. + References No definition available. + Details
Name: | tdw_NumberOfVesselsHeldForSale
Namespace Prefix: | tdw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration