Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies (Details Textual)

v3.23.1
Note 2 - Summary of Significant Accounting Policies (Details Textual)
$ in Thousands
3 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Number of Operating Segments 1    
Accounts Receivable, after Allowance for Credit Loss, Current, Total $ 0   $ 12
Trade Accounts Receivable [Member]      
Accounts Receivable, after Allowance for Credit Loss, Current, Total 0    
Sale of Inventory [Member]      
Revenue from Contract with Customer, Excluding Assessed Tax $ 0 $ 0