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Note 6 - Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2025
Notes Tables |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
|  | Fair value measurements using: |  |  |  |  |  |  |  |  |
|  | Quoted prices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | in active |  |  | Significant |  |  |  |  |  |  |  |  |  |  |  |  |
|  | markets for |  |  | other |  |  | Significant |  |  | Investments |  |  |  |  |
|  | identical assets |  |  | observable |  |  | unobservable |  |  | valued at |  |  |  |  |
|  | and liabilities |  |  | inputs |  |  | inputs |  |  | practical |  |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | expedient(1) |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 727.8 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 727.8 |
Current investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated VIEs |  |  | 238.7 |  |  |  | 474.7 |  |  |  | — |  |  |  | — |  |  |  | 713.4 |
Other investments |  |  | 292.4 |  |  |  | 31.2 |  |  |  | 9.0 |  |  |  | 30.1 |  |  |  | 362.7 |
Total current investments |  |  | 531.1 |  |  |  | 505.9 |  |  |  | 9.0 |  |  |  | 30.1 |  |  |  | 1,076.1 |
Other |  |  | — |  |  |  | 9.3 |  |  |  | 1.8 |  |  |  | — |  |  |  | 11.1 |
Total assets |  | $ | 1,258.9 |  |  | $ | 515.2 |  |  | $ | 10.8 |  |  | $ | 30.1 |  |  | $ | 1,815.0 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt(2) |  | $ | — |  |  | $ | 386.5 |  |  | $ | — |  |  | $ | — |  |  | $ | 386.5 |
Deferred bonuses |  |  | — |  |  |  | — |  |  |  | 46.2 |  |  |  | — |  |  |  | 46.2 |
Contingent consideration |  |  | — |  |  |  | — |  |  |  | 33.9 |  |  |  | — |  |  |  | 33.9 |
Other |  |  | 2.0 |  |  |  | 5.7 |  |  |  | — |  |  |  | — |  |  |  | 7.7 |
Total liabilities |  | $ | 2.0 |  |  | $ | 392.2 |  |  | $ | 80.1 |  |  | $ | — |  |  | $ | 474.3 |
|  | Fair value measurements using: |  |  |  |  |  |  |  |  |
|  | Quoted prices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | in active |  |  | Significant |  |  |  |  |  |  |  |  |  |  |  |  |
|  | markets for |  |  | other |  |  | Significant |  |  | Investments |  |  |  |  |
|  | identical assets |  |  | observable |  |  | unobservable |  |  | valued at |  |  |  |  |
|  | and liabilities |  |  | inputs |  |  | inputs |  |  | practical |  |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | expedient(1) |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 821.7 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 821.7 |
Current investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated VIEs |  |  | 260.6 |  |  |  | 241.5 |  |  |  | — |  |  |  | — |  |  |  | 502.1 |
Other investments |  |  | 273.8 |  |  |  | 33.7 |  |  |  | 2.0 |  |  |  | 27.6 |  |  |  | 337.1 |
Total current investments |  |  | 534.4 |  |  |  | 275.2 |  |  |  | 2.0 |  |  |  | 27.6 |  |  |  | 839.2 |
Other |  |  | — |  |  |  | 10.2 |  |  |  | 2.5 |  |  |  | — |  |  |  | 12.7 |
Total assets |  | $ | 1,356.1 |  |  | $ | 285.4 |  |  | $ | 4.5 |  |  | $ | 27.6 |  |  | $ | 1,673.6 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt(2) |  | $ | — |  |  | $ | 383.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 383.3 |
Deferred bonuses |  |  | — |  |  |  | — |  |  |  | 115.7 |  |  |  | — |  |  |  | 115.7 |
Contingent consideration |  |  | — |  |  |  | — |  |  |  | 30.4 |  |  |  | — |  |  |  | 30.4 |
Other |  |  | 1.9 |  |  |  | 11.7 |  |  |  | — |  |  |  | — |  |  |  | 13.6 |
Total liabilities |  | $ | 1.9 |  |  | $ | 395.0 |  |  | $ | 146.1 |  |  | $ | — |  |  | $ | 543.0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | Three months ended |
|  | March 31, |
|  | 2025 |  |  | 2024 |
Beginning of period fair value |  | $ | 4.5 |  |  | $ | 1.1 |
Fair value adjustments |  |  | (0.7 | ) |  |  | 0.6 |
Purchases (sales) of securities, net |  |  | 7.0 |  |  |  | — |
End of period fair value |  | $ | 10.8 |  |  | $ | 1.7 |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | Three months ended |
|  | March 31, |
|  | 2025 |  |  | 2024 |
Beginning of period fair value |  | $ | 146.1 |  |  | $ | 117.6 |
Fair value adjustments |  |  | 2.8 |  |  |  | 5.5 |
Settlement of contingent consideration |  |  | (0.3 | ) |  |  | — |
Vesting of deferred bonuses |  |  | (87.1 | ) |  |  | (81.5 | )
Amortization of deferred bonuses |  |  | 15.3 |  |  |  | 17.6 |
Foreign currency translation |  |  | 1.7 |  |  |  | (0.2 | )
Additions |  |  | 1.6 |  |  |  | — |
End of period fair value |  | $ | 80.1 |  |  | $ | 59.0 |

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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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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