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Note 8 - Commitments and Contingencies (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Jun. 30, 2017
Payments to Acquire Businesses, Gross   $ 4,145 $ 11,731
Scenario, Forecast [Member] | Wells Fargo Bank, National Association, and a Syndicate of Other Lenders [Member] | Unfunded Loan Commitment Letter [Member]      
Debt Instrument, Face Amount $ 2,525,000    
Scenario, Forecast [Member] | New Preferred Stock [Member]      
Preferred Stock, Dividend Rate, Cash, Percentage 8.00%    
Preferred Stock, Dividend Rate, Additional Preferred Stock, Percentage 8.50%    
Preferred Stock, Liquidation Preference Per Share $ 1,000    
KDLT-TV [Member] | Scenario, Forecast [Member]      
Business Combination, Consideration Transferred, Total $ 32,500    
Raycom [Member] | Scenario, Forecast [Member]      
Payments to Acquire Businesses, Gross $ 2,850,000    
Raycom [Member] | Scenario, Forecast [Member] | Common Stock [Member]      
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares 11,500,000    
Raycom [Member] | Scenario, Forecast [Member] | Preferred Stock [Member] | New Preferred Stock [Member]      
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares 650,000    
Business Acquisition, Equity Interest Issued or Issuable, Stated Value Per Share $ 1,000