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Note 9 - Debt - Summary of Debt Outstanding (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Long-term debt, gross | [1] | $ 171,712 | $ 197,975
Debt premiums and discounts, net |  | (5,174) | (5,244)
Less: Current portion of long-term debt |  | (18,201) | (27,797)
Total long-term debt |  | 148,337 | 164,934
The 8.00% Senior Secured Notes due August 2022 [Member] |  |  |
Long-term debt, gross | [2],[3],[4] | 135,210 | 147,049
NOK Denominated Notes Due May 2024 [Member] | Troms Offshore [Member] |  |  |
Long-term debt, gross | [1] | 5,981 | 5,954
NOK Denominated Notes Due January 2026 [Member] | Troms Offshore [Member] |  |  |
Long-term debt, gross | [1] | 7,339 | 14,559
USD Denominated Notes Due January 2027 [Member] | Troms Offshore [Member] |  |  |
Long-term debt, gross | [1] | 7,513 | 14,744
USD Denominated Notes Due April 2027 [Member] | Troms Offshore [Member] |  |  |
Long-term debt, gross | [1] | $ 15,669 | $ 15,669
[1] | We pay principal and interest on these notes semi-annually. As of March 31, 2021 and December 31, 2020, the aggregate fair value (Level 2) of the Troms Offshore borrowings was $36.3 million and $51.6 million, respectively. The weighted average interest rate of the Troms Offshore borrowings as of March 31, 2021 was 5.0%.
[2] | As of March 31, 2021 and December 31, 2020 the fair value (Level 2) of the Secured Notes was $134.2 million and $141.4 million, respectively.
[3] | During the three months ended March 31, 2021, we repurchased $11.8 million of the Secured Notes at a premium of $0.1 million in open market transactions.
[4] | The $9.1 million restricted cash on the balance sheet at March 31, 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.

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