Note 16 - Subsequent Event (Details) - Subsequent Event [Member] - Series B Preferred Stock [Member] - USD ($) $ / shares in Units, $ in Millions	Oct. 05, 2018	Oct. 02, 2018
Note 16 - Subsequent Event (Details) [Line Items]
Preferred Stock, Shares Authorized		166,667
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)		$ 6.00
Preferred Stock, Conversion Basis		convertible into Common Stock at a price of $2.00 per share
Preferred Stock, Dividend Rate, Percentage		8.00%
Stock Issued During Period, Shares, New Issues	166,667
Stock Issued During Period, Value, New Issues (in Dollars)	$ 1