Note 19 - Financial Instruments - Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Cash and cash equivalents (notes 3 and 4)	$ 20,780	$ 18,752
Short-term investments (notes 3 and 5)	29,186	29,054
LONG-TERM INVESTMENTS (notes 8)	992	992
Reported Value Measurement [Member]
Cash and cash equivalents (notes 3 and 4)	20,780	18,752
Restricted cash	39	37
Short-term investments (notes 3 and 5)	29,186	29,054
LONG-TERM INVESTMENTS (notes 8)	992	992
Estimate of Fair Value Measurement [Member]
Cash and cash equivalents (notes 3 and 4)	20,780	18,752
Restricted cash	39	37
Short-term investments (notes 3 and 5)	29,186	29,054
LONG-TERM INVESTMENTS (notes 8)	$ 992	$ 992

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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