Stock-Based Compensation, Phantom Stock Option Plan and Long-term Incentive Plan (Details) - 2011 Phantom Stock Option and Long-term Incentive Plan [Member] - USD ($)	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016
Stock option activity, shares [Roll Forward]
Total liability for long-term incentive plan	$ 1,700,000		$ 1,400,000
Stock Option [Member]
Stock option activity, shares [Roll Forward]
Outstanding at beginning of year (in shares)	1,353,554	1,257,508
Options granted (in shares)	578,200	493,760
Options paid in cash upon vesting (in shares)	0	(396,714)
Outstanding at year end (in shares)	1,931,754	1,354,554
Number of stock options vested (in shares)	408,034
Value of options vested	$ 845,200
Cash paid on options vested		$ 710,500
Allocated share-based compensation expense	$ 241,000	$ 180,000