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Note 4 - Cash, Cash Equivalents, and Restricted Cash - Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Cash	$ 4,588	$ 3,473
Money market	5,521	2,856
U.S. treasuries	6,987	0
Total cash and cash equivalents	17,096	6,329
Restricted cash	1,642	1,141
Total	$ 18,738	$ 7,470

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. Excludes cash and cash equivalents within disposal group and discontinued operation.

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