Note 7 - Preferred Stock (Details Textual) - Series A Perpetual Preferred Stock [Member]	Jan. 02, 2019 $ / shares shares
Preferred Stock, Liquidation Preference Per Share | $ / shares	$ 1,000
Preferred Stock, Dividend Rate, Cash, Percentage	8.00%
Preferred Stock, Dividend Rate, Additional Preferred Stock, Percentage	8.50%
Raycom [Member] | Preferred Stock [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	650,000