Note 2 - Acquisitions and Divestitures - Schedule of Acquired Intangible Assets of Lattner Entertainment Group Illinois (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Lattner Entertainment Group Illinois, LLC [Member]
Intangible Assets, Recorded Amount	$ 58
Host Agreements [Member]
Intangible Assets, Useful Life (Year)	13 years 4 months 24 days	14 years 4 months 24 days
Host Agreements [Member] | Lattner Entertainment Group Illinois, LLC [Member]
Intangible Assets, Useful Life (Year)	15 years
Intangible Assets, Recorded Amount	$ 58