Note 2 - Ownership Interests and Advances - Schedule of Equity Method Investment Partner Company Results Of Operation (Details) $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Current assets	$ 16,063	$ 26,350
Total Assets	69,035	107,577
Current liabilities	3,470	2,429
Total Liabilities and Equity	69,035	107,577
High Traction Stage [Member]
Current assets	104,024	91,968
Non-current assets	26,352	26,231
Total Assets	130,376	118,199
Current liabilities	72,972	80,783
Non-current liabilities	105,506	87,081
Shareholders’ deficit	(48,102)	(49,665)
Total Liabilities and Equity	$ 130,376	$ 118,199
Number of equity method ownership interests	12	13