Selected Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Consolidated Statements of Operations Data
Revenues	$ 130,589	$ 171,646	$ 132,374	$ 126,720	$ 120,373	$ 139,552	$ 107,204	$ 100,504	$ 561,329	$ 467,633	$ 377,527
Gross profit	84,714	123,565	86,950	84,090	80,279	99,807	69,134	64,562	379,319	313,782	228,330
Operating income	6,316	47,741	6,114	6,000	9,209	36,212	7,027	3,776	66,171	56,224	15,949
Net income	$ 4,950	$ 40,132	$ 5,467	$ 13,906	$ 10,241	$ 28,026	$ 5,704	$ 9,852	$ 64,455	$ 53,823	$ 38,598
Net income per share:
Basic (in dollars per share)	$ 0.09	$ 0.75	$ 0.10	$ 0.26	$ 0.19	$ 0.53	$ 0.11	$ 0.19	$ 1.20	$ 1.02	$ 0.74
Diluted (in dollars per share)	$ 0.09	$ 0.72	$ 0.10	$ 0.25	$ 0.18	$ 0.51	$ 0.10	$ 0.18	$ 1.15	$ 0.97	$ 0.70
Weighted-average shares used in computing net income per share:
Basic (in shares)	53,731	53,629	53,542	53,287	53,017	52,934	52,842	52,865	53,547	52,914	52,425
Diluted (in shares)	55,970	55,953	55,826	55,713	55,692	55,465	55,081	55,487	55,807	55,414	54,887