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v3.23.1

Note 2 - Investments (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Debt Securities, Held-to-Maturity [Table Text Block] |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (in thousands) |
Corporate bonds |  | $ | 2,983 |  |  | $ | 9 |  |  | $ | - |  |  | $ | 2,992 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Held-to-Maturity |
|  | Amortized Cost |  |  | Fair Value |
|  | (in thousands) |
One year or less |  | $ | 2,432 |  |  | $ | 2,440 |
Greater than one year through five years |  |  | 551 |  |  |  | 552 |
|  | $ | 2,983 |  |  | $ | 2,992 |

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- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5B -URI https://asc.fasb.org/extlink&oid=126970911&loc=SL120269825-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -URI https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563 + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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