Note 17 - Financial Instruments - Gain (Loss) on Embedded Derivatives (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Change in fair value of the Preferred Stock and Convertible Notes embedded derivatives	[1]	$ 1	$ 3

[1] Refer to Note 17, "Financial Instruments".