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Note 10 - Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
|  | Fair Value Measurements Using |
December 31, 2024 |  | Fair Value |  |  | Quoted Prices in Active Markets For Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Cash and cash equivalents |  | $ | 76,121 |  |  | $ | 76,121 |  |  | $ | – |  |  | $ | – |
Restricted cash and cash equivalents |  |  | 20,801 |  |  |  | 20,801 |  |  |  | – |  |  |  | – |
Marketable equity securities |  |  | 163,254 |  |  |  | 163,254 |  |  |  | – |  |  |  | – |
Corporate debt securities |  |  | 57,471 |  |  |  | 43,656 |  |  |  | 13,815 |  |  |  | – |
Asset–backed securities |  |  | 14,410 |  |  |  | − |  |  |  | 14,410 |  |  |  | – |
U.S. Treasury securities |  |  | 44,186 |  |  |  | 44,186 |  |  |  | – |  |  |  | – |
State and municipal securities |  |  | 3,737 |  |  |  | 806 |  |  |  | 2,931 |  |  |  | – |
Total financial assets |  | $ | 379,980 |  |  | $ | 348,824 |  |  | $ | 31,156 |  |  |  |  |
|  | Fair Value Measurements Using |
December 31, 2023 |  | Fair Value |  |  | Quoted Prices in Active Markets For Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Cash and cash equivalents |  | $ | 107,076 |  |  | $ | 107,076 |  |  | $ | – |  |  | $ | – |
Restricted cash and cash equivalents |  |  | 18,892 |  |  |  | 18,892 |  |  |  | – |  |  |  | – |
Marketable equity securities |  |  | 137,896 |  |  |  | 137,896 |  |  |  | – |  |  |  | – |
Corporate debt securities |  |  | 60,171 |  |  |  | 42,860 |  |  |  | 17,311 |  |  |  | – |
Asset–backed securities |  |  | 17,659 |  |  |  | – |  |  |  | 17,210 |  |  |  | 449 |
U.S. Treasury securities |  |  | 45,850 |  |  |  | 45,850 |  |  |  | – |  |  |  | – |
State and municipal securities |  |  | 4,047 |  |  |  | – |  |  |  | 4,047 |  |  |  | – |
Total financial assets |  | $ | 391,591 |  |  | $ | 352,574 |  |  | $ | 38,568 |  |  | $ | 449 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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