Summary of Significant Accounting Policies - Concentration Risk (Details)	12 Months Ended
	Jun. 30, 2017 customer item	Jun. 30, 2016 customer	Jun. 30, 2015 customer
Cash, cash equivalent and investments | Investment concentration risk
Concentration of Credit and Other Risks
Number of obligors or makers | item	1
Cash, cash equivalent and investments | Investment concentration risk | Maximum
Concentration of Credit and Other Risks
Percentage of concentration risk	5.00%
Total net revenue | Customer concentration risk
Concentration of Credit and Other Risks
Number of significant customers	0	1	0
Total net revenue | Customer concentration risk | Minimum
Concentration of Credit and Other Risks
Percentage of concentration risk	10.00%	10.00%	10.00%
Total accounts receivable | Credit concentration risk
Concentration of Credit and Other Risks
Number of significant customers	2	1
Percentage of concentration risk	30.00%	18.00%