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Note 8 - Marketable Securities - Short-term and Long-term Available for Sale Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Amortized Cost | $ 51,366 | $ 26,039
Unrealized Gains | 0 | 7
Unrealized Losses | (1,379) | (126)
Fair Value | 49,987 | 25,920
US Government Agencies Debt Securities [Member] |  |
Amortized Cost | 25,275 | 2,500
Unrealized Gains | 0 | 0
Unrealized Losses | (750) | (12)
Fair Value | 24,525 | 2,488
Corporate Debt Securities [Member] |  |
Amortized Cost | 9,578 | 9,303
Unrealized Gains | 0 | 0
Unrealized Losses | (205) | (44)
Fair Value | 9,373 | 9,259
US States and Political Subdivisions Debt Securities [Member] |  |
Amortized Cost | 15,574 | 12,549
Unrealized Gains | 0 | 0
Unrealized Losses | (417) | (70)
Fair Value | 15,157 | 12,479
Bank Time Deposits [Member] |  |
Amortized Cost | 939 | 1,687
Unrealized Gains | 0 | 7
Unrealized Losses | (7) | 0
Fair Value | $ 932 | $ 1,694

X
- Definition Amount, before tax, of unrealized gain 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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