Note 18 - Stockholder Rights Plan (Details Textual) - Right [Member]	May 22, 2020 $ / shares shares
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)	1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 5.60
Number of Units Called by Each Right (in shares)	0.01