Note 14 - Capital Structure and Stock-based Compensation - Stock Option Activity by Exercise Price Range (Details)	12 Months Ended
	Jun. 30, 2017 $ / shares shares
Range of exercise price range, lower limit (in dollars per share)	$ 16
Range of exercise price range, upper limit (in dollars per share)	$ 16
Options outstanding (in shares) | shares	6,000
Options outstanding, weighted average remaining contractual life (Year)	5 years 29 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 16
Options exercisable (in shares) | shares	4,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 16