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Note 1 - Nature of Activities and Summary of Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Cash and cash equivalents	$ 3,494	$ 4,313
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows	5,465	6,999
Other Current Assets [Member]
Restricted cash	10	725
Other Assets [Member]
Restricted cash	$ 1,961	$ 1,961

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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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