Note 6 - Investments - Investments (Details) - USD ($) $ in Thousands |
Mar. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Investment, Cost | $ 32,520 | $ 40,014 |
| Investment, Unrealized gain/(loss) | 0 | 0 |
| Investment, Market value | 32,520 | 40,014 |
| Guaranteed Investment Certificate [Member] | ||
| Investment, Cost | 20,026 | 20,016 |
| Investment, Unrealized gain/(loss) | 0 | 0 |
| Investment, Market value | 20,026 | 20,016 |
| Canadian Treasury Bill Securities [Member] | ||
| Investment, Cost | 12,494 | |
| Investment, Unrealized gain/(loss) | 0 | |
| Investment, Market value | $ 12,494 | |
| Commercial Notes [Member] | ||
| Investment, Cost | 19,998 | |
| Investment, Unrealized gain/(loss) | 0 | |
| Investment, Market value | $ 19,998 |
| X | ||||||||||
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before tax, of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). No definition available.
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