Note 4 - Fair Value Measurements - Financial Instruments Fair Value (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Long-term debt		$ 1,030,299	$ 704,349
Reported Value Measurement [Member] | Senior Unsecured Notes Due 2024 [Member]
Long-term debt	[1]	0	250,000
Reported Value Measurement [Member] | The 10.625% Senior Notes [Member]
Long-term debt, fair value	[1]	0	225,000
Estimate of Fair Value Measurement [Member] | Senior Unsecured Notes Due 2024 [Member]
Long-term debt	[1]	0	250,000
Estimate of Fair Value Measurement [Member] | The 10.625% Senior Notes [Member]
Long-term debt, fair value	[1]	$ 0	$ 225,000

[1] Fair value is determined using Level 2 inputs. The Company’s senior unsecured notes are quoted, but not actively traded, on major exchanges; therefore, fair value is based on periodic values as quoted on major exchanges. See Note 7 for additional information.