Stock Incentive Plan - Summary of Options (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Mar. 31, 2018 USD ($) $ / shares shares
Stock Incentive Plan
Number of Shares, Options outstanding, beginning of year | shares	2,893,240
Number of Shares, Options granted | shares	1,215,668
Number of Shares, Options exercised | shares	265,642
Number of Shares, Options cancelled or forfeited | shares	15,595
Number of Shares, Options outstanding, end of year | shares	4,390,145
Number of Shares, Options exercisable, end of year | shares	2,377,863
Weighted Average Exercise Price, Options outstanding, beginning of year | $ / shares	$ 3.48
Weighted Average Exercise Price, Options granted | $ / shares	12.94
Weighted Average Exercise Price, Options exercised | $ / shares	3.76
Weighted Average Exercise Price, Options cancelled or forfeited | $ / shares	3.40
Weighted Average Exercise Price, Options outstanding, end of year | $ / shares	5.51
Weighted Average Exercise Price, Options exercisable, end of year | $ / shares	$ 3.34
Weighted Average Remaining Contractual Life of outstanding stock options	4 years 2 months 1 day
Weighted Average Remaining Contractual Life of exercisable stock options	3 years 1 month 21 days
Aggregate Intrinsic Value of outstanding stock options | $	$ 35,774
Aggregate Intrinsic Value of exercisable stock options | $	$ 26,807