Quarterly report pursuant to Section 13 or 15(d)

Note 1 - Reporting entity (Details Textual)

v3.23.2
Note 1 - Reporting entity (Details Textual) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Notes To Financial Statements [Abstract]    
Accumulated deficit $ (492,135) $ (464,330)
Cash and investment 23,300 47,000
Working capital $ 13,300 $ 37,200