Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(9))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Name:	us-gaap_CashCashEquivalentsAndShortTermInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Note 1 - Organization and Significant Accounting Policies (Details Textual)	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022	Dec. 31, 2022 USD ($)	Sep. 20, 2022 USD ($)
Cash, Cash Equivalents, and Short-Term Investments	$ 56,900,000		$ 64,100,000
Supplier Concentration Risk [Member] \| Supply Purchase [Member]
Number of Suppliers	1	0
Supplier Concentration Risk [Member] \| Supply Purchase [Member] \| One Supplier [Member]
Concentration Risk, Percentage	15.00%
Supplier Concentration Risk [Member] \| Accounts Payable [Member]
Number of Suppliers	1		1
Supplier Concentration Risk [Member] \| Accounts Payable [Member] \| One Supplier [Member]
Concentration Risk, Percentage	22.00%		23.00%
The 2022 Term Loan 3 [Member]
Debt Instrument, Maximum Borrowing Capacity at Closing	$ 30,000,000			$ 30,000,000