Note 9 - Redeemable, Convertible Preferred Stock - Schedule of Redeemable, Convertible Preferred Stock (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Redeemable Convertible Preferred Stocks [Line Items]
Redeemable, convertible preferred stock	$ 218	$ 210
Series B Preferred Stock [Member]
Redeemable Convertible Preferred Stocks [Line Items]
Redeemable, convertible preferred stock	98	96
Series C Preferred Stock [Member]
Redeemable Convertible Preferred Stocks [Line Items]
Redeemable, convertible preferred stock	$ 120	$ 114