Summary of Significant Accounting Policies - Narrative (Details) shares in Thousands	3 Months Ended
	Sep. 30, 2019 USD ($) Segment shares	Sep. 30, 2018 USD ($) shares	Jul. 01, 2019 USD ($)	Jun. 30, 2019 USD ($)
Concentration Risk [Line Items]
Foreign currency transaction gain (loss), realized	$ (100,000)	$ 10,000
Derivative instruments not designated as hedging instruments, gain (loss), net	(100,000)	(100,000)
Bad debt expenses	0	0
Inventory valuation reserves	200,000			$ 200,000
Convertible notes receivable, aggregate amount	$ 2,000,000.0
Convertible notes receivable, interest rate	8.00%
Notes receivable	$ 2,200,000
Returns liability reserve, net	$ 300,000			$ 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	$ 200,000	400,000
Income tax expense	$ 689,000	$ 254,000
Antidilutive securities excluded from EPS calculation (in shares) | shares	21	9
Number of operating segments | Segment	1
Number of geographic segments | Segment	2
Operating lease liabilities	$ 3,219,000		$ 3,900,000
Right-of-use assets	2,706,000		3,300,000
Cumulative effect of adoption of accounting principle			$ 508,000
Cash accounts held primarily at One Financial Institution
Concentration Risk [Line Items]
Concentration of credit risk	10,000,000.0
Cash held primarily at Other Financial Institutions
Concentration Risk [Line Items]
Concentration of credit risk	$ 3,000,000.0