Summary of Significant Accounting Policies - Narrative (Details) shares in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020 USD ($) shares	Mar. 31, 2019 USD ($) shares	Mar. 31, 2020 USD ($) Segment shares	Mar. 31, 2019 USD ($) shares	Jul. 01, 2019 USD ($)	Jun. 30, 2019 USD ($)
Concentration Risk [Line Items]
Foreign currency transaction gain (loss), realized	$ (500,000)	$ (44,000)	$ (500,000)	$ (100,000)
Derivative instruments not designated as hedging instruments, gain (loss), net	100,000	(100,000)	(200,000)	(200,000)
Bad debt expenses	0	0	0	0
Inventory valuation reserves	200,000		$ 200,000			$ 200,000
Money back guarantee period			30 days
Returns liability reserve, net	300,000		$ 300,000			$ 400,000
Research and development	200,000	100,000	800,000	1,000,000.0
Income tax expense	$ 1,005,000	$ 376,000	$ 848,000	$ 210,000
Antidilutive securities excluded from EPS calculation (in shares) | shares	9	18	100	300
Number of operating segments | Segment			1
Number of geographic segments | Segment			2
Operating lease liabilities	$ 1,866,000		$ 1,866,000		$ 3,900,000
Right-of-use assets	$ 1,536,000		1,536,000		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			9,200,000
Cash held primarily at Other Financial Institutions
Concentration Risk [Line Items]
Concentration of credit risk			$ 4,300,000