Stock-Based Compensation, Stock Option Plan (Details) - 2008 Stock Option Plan [Member] - USD ($)	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
$6.25 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower range limit (in dollars per share)	$ 6.25
Range of exercise prices, upper range limit (in dollars per share)	$ 6.25
Number outstanding (in shares)	52,770
Options outstanding, weighted average remaining contractual life	2 years
Options outstanding, weighted average exercise price (in dollars per share)	$ 6.25
Options exercisable, weighted average remaining contractual life	2 years
Options exercisable, weighted average exercise price (in dollars per share)	$ 6.25
Stock Option [Member]
Stock option activity, shares [Roll Forward]
Outstanding at beginning of year (in shares)	64,770	95,670
Exercised (in shares)	(12,000)	(4,200)
Outstanding at year end (in shares)	52,770	91,470
Exercisable at period end (in shares)	52,770	91,470
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 year end (in dollars per share)	6.25	6.25
Exercisable at period end (in dollars per share)	$ 6.25	$ 6.25
Total intrinsic value of options exercised	$ 206,000	$ 33,000
Options granted (in shares)	0	0