Employee Benefit Plan (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Employee Benefit Plan
Company matching contributions equal to each employee's contribution (as a percent)	50.00%
Maximum contribution by the company as a percentage of employee's compensation for the Plan year	4.00%
Contributions to the Plan	$ 562	$ 579