Note 9 - Long-term Investments - Schedule of Level 3 Investments (Details) (Parentheticals) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Nonoperating Income (Expense) |
| Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Nonoperating Income (Expense) |
| X | ||||||||||
- Definition Indicates line item in statement of income or comprehensive income that includes unrealized gain (loss) from asset measured at fair value using unobservable input (level 3) and still held. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Indicates line item in statement of income or comprehensive income that includes gain (loss) from asset measured at fair value using unobservable input (level 3). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|