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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 |  |  |

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