XML 49 R39.htm IDEA: XBRL DOCUMENT
v3.20.2

Stockholders' Equity and Dilutive Equity Instruments - Summary of Common Shares and Creditor Warrants and Sum of Common Shares and Creditor Warrants Outstanding (Details) - shares | 6 Months Ended |
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Stockholders Equity Note [Line Items] |  |  |
Common stock, shares outstanding | 40,335,963 | 37,845,158 | 39,941,327
Restricted stock units | 632,345 | 279,702 |
Total | 42,738,204 | 41,842,242 |
New Creditor Warrants (Strike Price $0.001 Per Common Share) |  |  |
Stockholders Equity Note [Line Items] |  |  |
Creditor warrants | 817,742 | 2,034,235 |
GulfMark Creditor Warrants (Strike Price $0.01 Per Common Share) |  |  |
Stockholders Equity Note [Line Items] |  |  |
Creditor warrants | 952,154 | 1,683,147 |

X
- Definition Common stock shares and class of warrants or rights outstanding. + References No definition available. + Details
Name: | tdw_CommonStockSharesAndClassOfWarrantsOrRightsOutstanding
Namespace Prefix: | tdw_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Balance of restricted stock units outstanding. + References No definition available. + Details
Name: | tdw_RestrictedStockUnitsOutstanding
Namespace Prefix: | tdw_
Data Type: | xbrli:sharesItemType
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 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 Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: 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(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=tdw_NewCreditorWarrantsStrikePrice0001PerCommonShareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=tdw_GulfMarkCreditorWarrantsStrikePrice001PerCommonShareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |