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Note 2 - Acquisitions & Divestitures - Schedule of Acquired Intangible Assets of Lattner Entertainment Group Illinois (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 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 8 months 12 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