Summary of Significant Accounting Policies - Concentrations (Details)	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Net sales | Products | Product 1
Concentration risk
Concentration risk (as a percent)	15.00%	7.00%	18.00%	7.00%
Net sales | Products | Product 2
Concentration risk
Concentration risk (as a percent)	10.00%		9.00%
Net sales | Products | Product 3
Concentration risk
Concentration risk (as a percent)		46.00%		41.00%
Net sales | Customers | Customer A
Concentration risk
Concentration risk (as a percent)	26.00%	14.00%	26.00%	16.00%
Net sales | Customers | Customer B
Concentration risk
Concentration risk (as a percent)	21.00%	18.00%	23.00%	23.00%
Net sales | Customers | Customer C
Concentration risk
Concentration risk (as a percent)	8.00%	13.00%	10.00%	11.00%
Net sales | Customers | Customer D
Concentration risk
Concentration risk (as a percent)		14.00%		8.00%
Inventory purchases | Suppliers | JSP
Concentration risk
Concentration risk (as a percent)		34.00%	0.00%	33.00%