Note 2 - Summary of Significant Accounting Policies - Summary of Cash Balances (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Cash and Cash Equivalents, at Carrying Value, Total	$ 1,851,000	$ 962,000
Parent Company [Member]
Cash and Cash Equivalents, at Carrying Value, Total	1,685,000	941,000
Noncontrolling Interest [Member]
Cash and Cash Equivalents, at Carrying Value, Total	$ 166,000	$ 21,000

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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