Stock Incentive Plan - Summary of Options (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares
Stock Incentive Plan
Number of Shares, Options outstanding, beginning of year | shares	2,893,240
Number of Shares, Options granted | shares	179,289
Number of Shares, Options exercised | shares	(166,330)
Number of Shares, Options cancelled or forfeited | shares	(14,750)
Number of Shares, Options outstanding, end of year | shares	2,891,449
Number of Shares, Options exercisable, end of year | shares	2,396,914
Weighted Average Exercise Price, Options outstanding, beginning of year | $ / shares	$ 3.48
Weighted Average Exercise Price, Options granted | $ / shares	8.94
Weighted Average Exercise Price, Options exercised | $ / shares	3.68
Weighted Average Exercise Price, Options cancelled or forfeited | $ / shares	3.41
Weighted Average Exercise Price, Options outstanding, end of year | $ / shares	3.80
Weighted Average Exercise Price, Options exercisable, end of year | $ / shares	$ 3.40
Weighted Average Remaining Contractual Life of outstanding stock options	3 years 11 months 5 days
Weighted Average Remaining Contractual Life of exercisable stock options	3 years 6 months 7 days
Aggregate Intrinsic Value of outstanding stock options | $	$ 29,424
Aggregate Intrinsic Value of exercisable stock options | $	$ 25,359