Summary of Significant Accounting Policies - Narrative (Details)		12 Months Ended
	Oct. 19, 2015	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Summary of Significant Accounting Policies Additional Information [Abstract]
Recorded bad debt expense		$ 0	$ 0	$ 0
Impairment of intangible assets		0
Loss from write-off of intangible assets		$ 0	350,000	0
Money back guarantee period		30 days
Percentage of products can be returned for a full refund by terminated distributors		30.00%
Restocking fee percent for full refund (percent)		10.00%
Reserve balance for returns and allowances		$ 400,000	400,000
Research and development		$ 1,200,000	$ 1,100,000	$ 1,000,000
Stock split ratio	7
Blended tax rate		28.00%	34.00%	35.00%
Cash Accounts Held Primarily At Financial Institution
Summary of Significant Accounting Policies Additional Information [Abstract]
Concentration of credit risk		$ 11,400,000
Cash Accounts Held at Other Financial Institutions
Summary of Significant Accounting Policies Additional Information [Abstract]
Concentration of credit risk		$ 5,300,000