Note 3 - Cash and Cash Equivalents	12 Months Ended
Dec. 31, 2022
Notes to Financial Statements
Cash and Cash Equivalents Disclosure [Text Block]	NOTE 3. CASH AND CASH EQUIVALENTS As of December 31, 2022, we had $2.7 million of cash and cash equivalents invested in a money market fund with net assets invested in U.S. Dollar denominated money market securities of domestic and foreign issuers, U.S. Government securities and repurchase agreements. We consider all liquid investments with original maturities of three months or less at the time of purchase to be cash equivalents. We have cash on deposit in excess of federally insured limits at a bank. We do not believe that maintaining substantially all such assets with the bank or investing in a liquid mutual fund represent material risks.

The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) 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. Generally, only investments maturing within three months from the date of acquisition qualify.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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