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Note 3 - Acquisition of Swire Pacific Offshore Holdings Ltd (Details Textual) $ / shares in Units, $ in Thousands |  | 2 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Apr. 22, 2022 USD ($) $ / shares shares | Jun. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2022 USD ($)
Warrans Issued to Acquire Swire Pacific Offshore Holdings Ltd. [Member] |  |  |  |
Class of Warrant or Right, Issued During Period, Exercise Price (in dollars per share) | $ / shares | $ 0.001 |  |  |
Swire Pacific Offshore Holdings Ltd. [Member] |  |  |  |
Number of Vessels, Offshore Support | 50 |  |  |
Payments to Acquire Businesses, Gross | $ 42,000 |  |  |
Payments to Acquire Businesses, Preclosing Working Capital Adjustments | 19,600 |  |  |
Business Combination, Consideration Transferred, Total | 223,500 |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  | $ 43,200 |  |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  | 5,300 |  |
Business Combination, Acquisition Related Costs |  |  | $ 7,200 | $ 9,400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Total | $ 179,707 | 179,700 | 179,700 | $ 179,700
Property, Plant and Equipment, Original Lie of Asset (Year) |  |  |  | 20 years
Goodwill, Ending Balance |  | $ 0 | $ 0 | $ 0
Swire Pacific Offshore Holdings Ltd. [Member] | Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  | 1 year
Swire Pacific Offshore Holdings Ltd. [Member] | Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  | 16 years
Swire Pacific Offshore Holdings Ltd. [Member] | Warrans Issued to Acquire Swire Pacific Offshore Holdings Ltd. [Member] |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares | 8,100,000 |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI https://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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