Note 5 - Related Party Lease (Details Textual) - Lease Agreement with Z3 Investment LLC [Member]		3 Months Ended
Mar. 24, 2022 USD ($) ft²	Mar. 31, 2023 USD ($)
Area of Real Estate Property \| ft²	35,000
Second Six Months, Rental Expense, Operating Lease	$ 104,000
Percent Increase, Annual Rental Expense	4.00%
Operating lease, Operating Expenses, Per Month	$ 5,000
Operating Lease, Payments		$ 321,000

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479041/842-20-45-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-4

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration