XML 35 R23.htm IDEA: XBRL DOCUMENT
v3.25.3

Note 5 - Stockholders' Equity and Dilutive Equity Instruments (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
(In Thousands) |  | Three Months Ended |
|  | September 30, 2025 |  |  | September 30, 2024 |
Balance at June 30, 2025 and 2024 |  | $ | 7,273 |  |  | $ | 5,062 |
Unrealized gain on note receivable |  |  | — |  |  |  | 130 |
Pension benefits recognized in OCI |  |  | 621 |  |  |  | (600 | )
Balance at September 30, 2025 and 2024 |  | $ | 7,894 |  |  | $ | 4,592 |
(In Thousands) |  | Nine Months Ended |
|  | September 30, 2025 |  |  | September 30, 2024 |
Balance at December 31, 2024 and 2023 |  | $ | 6,060 |  |  | $ | 5,266 |
Unrealized gain on note receivable |  |  | — |  |  |  | 283 |
Pension benefits recognized in OCI |  |  | 1,834 |  |  |  | (957 | )
Balance at September 30, 2025 and 2024 |  | $ | 7,894 |  |  | $ | 4,592 |
Schedule of Total Shares Outstanding Including Warrants and Restricted Stock Units [Table Text Block] |
Total shares outstanding including warrants and restricted stock units |  | September 30, 2025 |  |  | September 30, 2024 |
Common shares outstanding |  |  | 49,562,017 |  |  |  | 52,322,461 |
New creditor warrants (strike price $0.001 per common share) |  |  | 21,400 |  |  |  | 76,175 |
GulfMark creditor warrants (strike price $0.01 per common share) |  |  | 53,555 |  |  |  | 77,313 |
Restricted stock units |  |  | 600,759 |  |  |  | 695,576 |
Total |  |  | 50,237,731 |  |  |  | 53,171,525 |

X
- Definition The tabular disclosure of total shares outstanding including warrants and restricted stock units. + References No definition available. + Details
Name: | tdw_ScheduleOfTotalSharesOutstandingIncludingWarrantsAndRestrictedStockUnitsTableTextBlock
Namespace Prefix: | tdw_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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