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Note 2 - Investments | 12 Months Ended
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Dec. 31, 2022
Notes to Financial Statements |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] |
2. | INVESTMENTS
Amortized cost and fair value of debt securities at December 31, 2022 consisted of the following:
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (in thousands) |
Corporate bonds |  | $ | 2,983 |  |  | $ | 9 |  |  | $ | - |  |  | $ | 2,992 |
Maturities of debt securities at December 31, 2022 were as follows:
|  | 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 |
The fair value of debt securities were measured using Level 1 inputs which are based on quotes for trades occurring in active markets for identical assets.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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