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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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