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Note 9 - Debt - Summary of Debt Outstanding (Details) - USD ($)

Sep. 30, 2021

Dec. 31, 2020

Long-term debt, gross

$ 158,754

$ 197,975

Debt premiums and discounts, net

(3,620,000)

(5,244,000)

Less: Current portion of long-term debt

(140,995,000)

(27,797,000)

Total long-term debt

14,139,000

164,934,000

The 8.00% Senior Secured Notes due August 2022 [Member]

Long-term debt, gross

^[1],[2],[3]

135,210,000

147,049,000

NOK Denominated Notes Due May 2024 [Member] | Troms Offshore [Member]

Long-term debt, gross

^[4]

2,763,000

5,954,000

NOK Denominated Notes Due January 2026 [Member] | Troms Offshore [Member]

Long-term debt, gross

^[4]

6,450,000

14,559,000

USD Denominated Notes Due January 2027 [Member] | Troms Offshore [Member]

Long-term debt, gross

^[4]

6,887,000

14,744,000

USD Denominated Notes Due April 2027 [Member] | Troms Offshore [Member]

Long-term debt, gross

^[4]

$ 7,444,000

$ 15,669,000

[1]	As of September 30, 2021 and December 31, 2020 the fair value (Level 2) of the Senior Secured Notes was $136.4 million and $141.4 million, respectively.
[2]	During the nine months ended September 30, 2021, we repurchased $11.8 million of the Senior Secured Notes at a premium of $0.1 million in open market transactions.
[3]	The $24.1 million restricted cash on the balance sheet at September 30, 2021, represents approximately 65% of net proceeds from asset dispositions since the date of the last tender offer and is restricted by the terms of the Indenture.
[4]	We pay principal and interest on these notes semi-annually. As of September 30, 2021 and December 31, 2020, the aggregate fair value (Level 2) of the Troms Offshore borrowings was $23.6 million and $51.6 million, respectively. The weighted average interest rate of the Troms Offshore borrowings as of September 30, 2021 was 5.0%.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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