Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Quarterly Financial Data [Abstract]
Net revenue	$ 113,786	$ 99,832	$ 100,329	$ 90,950	$ 112,094	$ 97,312	$ 87,502	$ 86,506
Gross profit	47,985	36,249	39,355	38,106	43,185	35,425	31,387	31,344	$ 161,695	$ 141,341	$ 158,713
Net loss	$ (946)	$ (8,852)	$ (4,719)	$ (9,382)	$ (5,255)	$ (5,029)	$ (9,369)	$ (9,926)	$ (23,899)	$ (29,579)	$ (25,504)
Net loss per share—basic and diluted	$ (0.01)	$ (0.10)	$ (0.06)	$ (0.11)	$ (0.06)	$ (0.06)	$ (0.11)	$ (0.12)	$ (0.28)	$ (0.36)	$ (0.32)
Shares used in basic and diluted per share calculation	85,677	85,459	84,586	83,747	83,179	82,913	82,328	81,576	84,893	82,495	80,509