Summary of Significant Accounting Policies - Narrative (Details) shares in Thousands	3 Months Ended
	Sep. 30, 2018 USD ($) Segment shares	Sep. 30, 2017 USD ($) shares	Jun. 30, 2018 USD ($)
Concentration Risk [Line Items]
Foreign currency transaction gains realized	$ 10,000	$ 100,000
Derivative instruments, realized (loss) gain	(100,000)	3,000
Bad debt expenses	0	0
Inventory valuation reserves	1,200,000		$ 1,400,000
Convertible notes receivable, aggregate amount	$ 2,000,000
Convertible notes receivable, interest rate	8.00%
Maximum equity to be held if converted	15.00%
Notes receivable	$ 1,400,000
Money back guarantee period	30 days
Percentage of products can be returned for a full refund by terminated distributors (up to)	30.00%
Percent of restocking fee	10.00%
Research and development	$ 400,000	300,000
Income tax expenses	$ 254,000	$ 441,000
Antidilutive securities excluded from EPS calculation (in shares) | shares	9	200
Number of operating segments | Segment	1
Number of geographic segments | Segment	2
Revenue, net	$ 55,609,000	$ 49,127,000
Cash accounts held primarily at One Financial Institution
Concentration Risk [Line Items]
Concentration of credit risk	13,900,000
Cash held primarily at Other Financial Institutions
Concentration Risk [Line Items]
Concentration of credit risk	3,200,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | ASU 2014-09
Concentration Risk [Line Items]
Revenue, net	$ (100,000)