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v3.20.2

Summary of Significant Accounting Policies - Narrative (Details) shares in Millions | 12 Months Ended |
--- | --- | ---
Jun. 30, 2020 USD ($) Segment lease shares | Jun. 30, 2019 USD ($) shares | Jun. 30, 2018 USD ($) shares | Jun. 30, 2017 USD ($)
Summary of Significant Accounting Policies Additional Information [Abstract] |  |  |  |
Recorded bad debt expense | $ 0 | $ 0 | $ 0 |
Inventory valuation reserves | 200,000 | 200,000 |  |
Impairment of intangible assets | 0 | 0 |  |
Research and development | $ 900,000 | $ 1,100,000 | $ 1,200,000 |
Number of finance leases | lease | 0 |  |  |
Number of antidilutive securities (in shares) | shares | 0.1 | 0.2 | 0.4 |
Number of geographic segments | Segment | 2 |  |  |
Right-of-use assets | $ 956,000 | $ 0 |  |
Lease liabilities | 1,184,000 | 0 |  |
Stockholders' equity attributable to parent | $ 33,254,000 | 27,707,000 | $ 21,944,000 | $ 14,527,000
Accounting standards update | us-gaap:AccountingStandardsUpdate201602Member |  |  |
Cumulative effect of adoption of accounting principle |  |  |  |
Summary of Significant Accounting Policies Additional Information [Abstract] |  |  |  |
Right-of-use assets |  | 3,300,000 |  |
Lease liabilities |  | 3,900,000 |  |
Stockholders' equity attributable to parent |  | $ 508,000 | $ (3,000) |
Cash Accounts Held Primarily At Financial Institution |  |  |  |
Summary of Significant Accounting Policies Additional Information [Abstract] |  |  |  |
Concentration of credit risk | $ 17,800,000 |  |  |
Cash Accounts Held at Other Financial Institutions |  |  |  |
Summary of Significant Accounting Policies Additional Information [Abstract] |  |  |  |
Concentration of credit risk | $ 4,300,000 |  |  |

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