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Note 3 - Fair Value Measurements - Fair Value and Carrying Value of the Notes (Details) - Senior Notes [Member] - USD ($) $ in Thousands | Mar. 31, 2023 | Mar. 31, 2022
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Reported Value Measurement [Member] |  |
2025 Notes | $ 170,272 | $ 169,365
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
2025 Notes | $ 161,072 | $ 185,438

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- Definition Fair value portion of notes payable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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