Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue, net	$ 56,170	$ 56,012	$ 58,167	$ 55,609	$ 54,033	$ 50,562	$ 49,482	$ 49,127	$ 225,958	$ 203,204	$ 199,489
Americas
Disaggregation of Revenue [Line Items]
Revenue, net									163,236	151,609	150,841
Asia/Pacific & Europe
Disaggregation of Revenue [Line Items]
Revenue, net									62,722	51,595	48,648
United States
Disaggregation of Revenue [Line Items]
Revenue, net									151,966	142,452	144,842
Japan
Disaggregation of Revenue [Line Items]
Revenue, net									$ 40,796	$ 41,843	$ 39,390