Stock-Based Compensation, Stock Option Plan (Details) - 2008 Stock Option Plan [Member] - Stock Option [Member] - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Stock option activity, shares [Roll Forward]
Outstanding at beginning of year (in shares)			64,770	95,670
Exercised (in shares)			(27,000)	(13,200)
Outstanding at period end (in shares)	37,770	82,470	37,770	82,470
Exercisable at period end (in shares)	37,770	82,470	37,770	82,470
Stock option activity, weighted average exercise price per share [Abstract]
Outstanding at beginning of year (in dollars per share)			$ 6.25	$ 6.25
Exercised (in dollars per share)			6.25	6.25
Outstanding at period end (in dollars per share)	$ 6.25	$ 6.25	6.25	6.25
Exercisable at period end (in dollars per share)	$ 6.25	$ 6.25	$ 6.25	$ 6.25
Total intrinsic value of options exercised	$ 208,000	$ 82,000	$ 339,000	$ 115,000
Options granted (in shares)			0	0