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Note 1 - Basis of Presentation (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Jan. 01, 2019
Jun. 30, 2019
Mar. 31, 2019
Jan. 02, 2019
Dec. 31, 2018
Operating Lease, Right-of-Use Asset   $ 66,000     $ 0
Operating Lease, Liability, Total   67,000      
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect   0 $ 0    
Retained Earnings [Member]          
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect   $ 3,000 $ 2,000    
Accounting Standards Update 2016-02 [Member]          
Operating Lease, Right-of-Use Asset $ 21,000        
Operating Lease, Liability, Total 21,000        
Accounting Standards Update 2016-02 [Member] | Raycom [Member]          
Operating Lease, Right-of-Use Asset       $ 52,000  
Operating Lease, Liability, Total       $ 52,000  
Accounting Standards Update 2018-02 [Member] | Retained Earnings [Member]          
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect $ 5,000