Note 4 - Investments - Details Investments by Major Investment Category (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Amortized costs	$ 2,145
Gross unrealized gains	0
Gross unrealized losses	0
Total	2,145	$ 0
US Government Agencies Debt Securities [Member]
Amortized costs	1,995
Gross unrealized gains	0
Gross unrealized losses	0
Total	1,995
Common Stock [Member]
Amortized costs	150
Gross unrealized gains	0
Gross unrealized losses	0
Total	$ 150

Amount of accumulated unrecognized gain on investment in Equity Securities, FvNi.

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Amount of accumulated unrealized loss on investment in Equity Securities, FvNi.

+ References

No definition available.

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Amount of accumulated unrecognized gain on marketable securities.

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Amount of accumulated unrealized loss on investment in marketable securities.

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Amount of short-term investment measured at amortized cost.

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

+ References

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- Definition

Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

+ References

No definition available.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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- Definition

Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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