Note 11 - Share-based Compensation - Option Activity (Details)	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Outstanding, options (in shares) | shares	54,362
Outstanding, options, weightedd average exercise price (in dollars per share) | $ / shares	$ 11.16
Forfeited, options (in shares) | shares	(54,362)
Forfeited, options, weightedd average exercise price (in dollars per share) | $ / shares	$ 11.16
Outstanding, options (in shares) | shares
Outstanding, options, weightedd average exercise price (in dollars per share) | $ / shares
Exercisable, options (in shares) | shares
Exercisable, options, weightedd average exercise price (in dollars per share) | $ / shares