Summary of Significant Accounting Policies - Narrative (Details) shares in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2018 USD ($) Segment shares	Dec. 31, 2017 USD ($) shares	Jun. 30, 2018 USD ($)
Concentration Risk [Line Items]
Foreign currency transaction losses realized	$ 100,000	$ 100,000	$ 100,000	$ 8,000
Derivative instruments, realized loss	25,000	100,000	100,000	100,000
Bad debt expenses	0	0	0	0
Inventory valuation reserves	1,400,000		1,400,000		$ 1,400,000
Convertible notes receivable, aggregate amount	2,000,000		$ 2,000,000
Convertible notes receivable, interest rate			8.00%
Notes receivable	$ 2,000,000		$ 2,000,000
Money back guarantee period			30 days
Percentage of products can be returned for a full refund by terminated distributors (up to)	30.00%		30.00%
Percent of restocking fee	10.00%		10.00%
Research and development	$ 500,000	300,000	$ 900,000	500,000
Income tax benefit (expense)	$ 420,000	$ (1,738,000)	$ 166,000	$ (2,179,000)
Antidilutive securities excluded from EPS calculation (in shares) | shares	0.1	0.1	0.2	0.3
Number of operating segments | Segment			1
Number of geographic segments | Segment			2
Cash accounts held primarily at One Financial Institution
Concentration Risk [Line Items]
Concentration of credit risk			$ 13,400,000
Cash held primarily at Other Financial Institutions
Concentration Risk [Line Items]
Concentration of credit risk			5,600,000
ASU 2014-09
Concentration Risk [Line Items]
Revenue recognized related to accrued loyalty points			$ 500,000