Note 13 - Stock Compensation Plans Subsequent Event - Options Outstanding (Details)	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Exercise price (in dollars per share) | $ / shares	$ 10.81
Options outstanding, number (in shares) | shares	19,200
Options outstanding, weighted average remaining contractual life (Year)	3 days
Options exercisable, number (in shares) | shares	19,200
Options exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 10.81