XML 48 R38.htm IDEA: XBRL DOCUMENT
v3.20.2

Stockholders' Equity and Dilutive Equity Instruments - Additional Information (Detail) |  |  | 6 Months Ended
--- | --- | --- | ---
Apr. 24, 2020 shares $ / shares | Apr. 13, 2020 | Jun. 30, 2020 $ / shares shares | Jun. 30, 2019 $ / shares shares
Stockholders Equity Note [Line Items] |  |  |  |
Rights expiration description |  | The rights will expire on the earliest of (i) the close of business on April 13, 2023, (ii) the time at which the rights are redeemed or exchanged, or (iii) the time at which the Board determines that the Tax Attributes are fully utilized, expired, no longer necessary or become limited under Section 382 |  |
Series A Junior Participating Preferred Stock |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Number of shares allowed to purchase for each right | shares | 0.001 |  |  |
Par value of shares allowed to purchase under right |  |  |  |
Purchase price of each right | 38.00 |  |  |
Price of redemption of each right | $ 0.001 |  |  |
Beneficial Owner |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Percentage of ownership interest subject to dilution |  | 4.99% |  |
Equity method ownership percentage |  | 4.99% |  |
Percentage of additional ownership interest to be acquired by existing shareholders subject to dilution |  | 0.50% |  |
In-the-money Warrants and Restricted Stock Awards and Units |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Incremental "in-the-money" warrants, and restricted stock awards and units | shares |  |  | 2,402,241 | 3,997,084
Out-of-the-money Warrants |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Warrants outstanding | shares |  |  | 5,923,399 | 5,923,399
Out-of-the-money Warrants | Series A Warrants |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Warrants exercise prices |  |  | $ 57.06 | $ 57.06
Out-of-the-money Warrants | Series B Warrants |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Warrants exercise prices |  |  | 62.28 | 62.28
Out-of-the-money Warrants | GLF Equity Warrants |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Warrants exercise prices |  |  | $ 100.00 | $ 100.00

X
- Definition Number of shares allowed to purchase under rights for each share. + References No definition available. + Details
Name: | tdw_NumberOfSharesAllowedToPurchaseUnderRightsForEachShare
Namespace Prefix: | tdw_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of additional shares to be acquired by existing shareholders subject to dilution. + References No definition available. + Details
Name: | tdw_PercentageOfAdditionalSharesToBeAcquiredByExistingStockholdersSubjectToDilution
Namespace Prefix: | tdw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of ownership of outstanding common stock subject to dilutuion. + References No definition available. + Details
Name: | tdw_PercentageOfOwnershipOfOutstandingCommonStockSubjectToDilutuion
Namespace Prefix: | tdw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Redemption of rights price per share. + References No definition available. + Details
Name: | tdw_RedemptionOfRightsPricePerShare
Namespace Prefix: | tdw_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rights expiration description + References No definition available. + Details
Name: | tdw_RightsExpirationDescription
Namespace Prefix: | tdw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stockholders Equity Note [Line Items] + References No definition available. + Details
Name: | tdw_StockholdersEquityNoteLineItems
Namespace Prefix: | tdw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount per share of no-par value preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockNoParValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_BeneficialOwnerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=tdw_InTheMoneyOptionsWarrantsAndRestrictedStockAwardsAndUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=tdw_OutOfTheMoneyWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=tdw_SeriesAWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=tdw_SeriesBWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=tdw_GLFEquityWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |