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Stock Based Compensation (Schedule of Stock Option Activity) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Mar. 31, 2019	Jun. 30, 2018
Number of Shares Subject To Options
Balance at July 1, 2018	222,854
Granted	55,589
Exercised	(15,399)	(20,601)
Forfeited or expired	(3,055)
Outstanding at March 31, 2019	259,989	222,854
Vested or expected to vest at March 31, 2019	244,246
Exercisable at March 31, 2019	155,450
Weighted Average Exercise Price
Balance at July 1, 2018	$ 24.29
Granted	27.17
Exercised	19.88
Forfeited or expired	26.30
Outstanding at March 31, 2019	25.14	$ 24.29
Vested or expected to vest at March 31, 2019	25.17
Exercisable at March 31, 2019	$ 25.40
Weighted Average Remaining Contractual Term
Outstanding	6 years 7 months 10 days	6 years 3 months 4 days
Granted	9 years 8 months 9 days
Vested or expected to vest at March 31, 2019	6 years 5 months 12 days
Exercisable at March 31, 2019	4 years 10 months 25 days
Aggregate Intrinsic Value
Outstanding at March 31, 2019	$ 223,377
Vested or expected to vest at March 31, 2019	202,294
Exercisable at March 31, 2019	$ 81,300

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