Note 1 - Basis of Presentation - Proceeds Received for Project (Details) - Sale Agreement with the Doraville Community Improvement District [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Proceeds received in advance of asset sale	$ 0	$ 0	$ 0	$ 9
Proceeds for reimbursement of development costs	0	0	6	29
Total proceeds received from CID	$ 0	$ 0	$ 6	$ 38