Stock-based Compensation (Schedule of Changes in Non-Vested Stock Options) (Details)	12 Months Ended
	Jun. 30, 2017 $ / shares shares
Weighted Average Number of Shares Subject to Option
Non-vested, beginning balance | shares	45,800
Granted | shares	41,150
Vested | shares	(41,050)
Forfeited or expired | shares	(3,000)
Non-vested, ending balance | shares	42,900
Average Grant Date Fair Value
Balance, beginning | $ / shares	$ 4.564
Granted | $ / shares	4.640
Vested | $ / shares	4.609
Forfeited or expired | $ / shares	4.681
Outstanding, ending | $ / shares	$ 4.586