Note 2 - Investments - Maturities of Debt Securities (Details) $ in Thousands	Dec. 31, 2022 USD ($)
One year or less, amortized cost	$ 2,432
One year or less, fair value	2,440
Greater than one year through five years, amortized cost	551
Greater than one year through five years, fair value	552
Held-to-maturity securities, amortized cost	2,983
Held-to-maturity securities, fair value	$ 2,992

Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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-Name Accounting Standards Codification
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-Section 45
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Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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