Note 2 - Ownership Interests and Advances - Schedule of Equity Method Investment Partner Company Results Of Operation (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Current assets	$ 9,911	$ 21,423
Total Assets	22,836	37,692
Current liabilities	2,046	1,817
Total Liabilities and Equity	22,836	37,692
High Traction Stage [Member]
Current assets	49,546	126,042
Non-current assets	9,892	55,073
Total Assets	59,438	181,115
Current liabilities	32,461	92,990
Non-current liabilities	42,370	220,681
Shareholders’ deficit	(15,393)	(132,556)
Total Liabilities and Equity	$ 59,438	$ 181,115
Number of equity method ownership interests	4	8