Note 9 - Leases - Lease Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Right-of-use operating lease assets – related party, net	$ 372,000	$ 571,000
Operating lease cost	311,000	311,000
Variable lease cost	111,000	105,000
Non-current lease liability – related party	131,000	398,000
Total lease cost	$ 422,000	$ 416,000
Weighted average remaining lease term (Year)	1 year 4 months 24 days	2 years 4 months 24 days
Discount rate	22.00%	22.00%
Current Liabilities [Member]
Current lease liability (included in other current liabilities)	$ 267,000	$ 206,000