Organization and Summary of Significant Accounting Policies (Details) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
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Apr. 20, 2018
USD ($)
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Jan. 03, 2018
USD ($)
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Mar. 31, 2018
vessel
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Jun. 30, 2018
USD ($)
vessel
segment
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Dec. 31, 2017
USD ($)
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| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||||
| Number of harbor tug vessels | vessel | 10 | ||||
| Number of offshore vessels | vessel | 2 | ||||
| Number of additional vessels | vessel | 7 | 7 | |||
| Number of operating segments | segment | 4 | ||||
| Operating loss carryforwards | $ 62.8 | ||||
| Valuation allowance | $ 1.4 | 0.4 | |||
| Expire In 2035 | |||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||||
| Operating loss carryforwards | $ 4.0 | ||||
| South Texas Fabrication Yards | Disposal Group, Held-for-sale, Not Discontinued Operations | |||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||||
| Sale of PP&E | $ 55.0 | ||||
| Cost of PP&E sales | 1.5 | ||||
| Proceeds from sale of PP&E | $ 52.7 | $ 0.8 |
| X | ||||||||||
- Definition Construction In Progress, Number Of Additional Vessels No definition available.
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- Definition Construction In Progress, Number Of Harbor Tug Vessels No definition available.
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- Definition Construction In Progress, Number Of Offshore Vessels No definition available.
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. No definition available.
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- Definition Amount of costs of goods sold attributable to disposal group, including, but not limited to, discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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. No definition available.
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. No definition available.
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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