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Summary of Significant Accounting Policies - Narrative (Details) shares in Millions | 12 Months Ended |
--- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) lease | Jun. 30, 2021 USD ($) shares | Jun. 30, 2021 USD ($) segment | Jun. 30, 2021 USD ($) region | Jun. 30, 2020 USD ($) shares | Jun. 30, 2019 USD ($) shares | Jun. 30, 2018 USD ($) | Jul. 01, 2019 USD ($)
Summary of Significant Accounting Policies Additional Information [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded bad debt expense |  | $ 0 |  |  |  |  | $ 0 | $ 0 |  |
Inventory valuation reserves | $ 500,000 | 500,000 | $ 500,000 | $ 500,000 | $ 500,000 | $ 500,000 | 200,000 |  |  |
Impairment of intangible assets |  | 0 |  |  |  |  | 0 |  |  |
Research and development |  | 700,000 |  |  |  |  | $ 900,000 | $ 1,100,000 |  |
Number of finance leases | lease |  |  | 0 |  |  |  |  |  |  |
Number of antidilutive securities (in shares) | shares |  |  |  | 0.1 |  |  | 0.1 | 0.2 |  |
Number of geographic segments |  |  |  |  | 2 | 2 |  |  |  |
Accounting standards update | us-gaap:AccountingStandardsUpdate201602Member |  |  |  |  |  |  | us-gaap:AccountingStandardsUpdate201602Member | us-gaap:AccountingStandardsUpdate201602Member |
Lease liabilities | $ 18,183,000 | 18,183,000 | $ 18,183,000 | $ 18,183,000 | $ 18,183,000 | $ 18,183,000 |  |  |  |
Right-of-use assets | 13,700,000 | 13,700,000 | 13,700,000 | 13,700,000 | 13,700,000 | 13,700,000 | $ 956,000 |  |  |
Stockholders' equity attributable to parent | $ 36,807,000 | 36,807,000 | $ 36,807,000 | $ 36,807,000 | $ 36,807,000 | $ 36,807,000 | $ 33,254,000 | $ 27,199,000 | $ 21,947,000 |
Cumulative effect of adoption of accounting principle |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies Additional Information [Abstract] |  |  |  |  |  |  |  |  |  |
Lease liabilities |  |  |  |  |  |  |  |  |  | $ 3,900,000
Right-of-use assets |  |  |  |  |  |  |  |  |  | 3,300,000
Stockholders' equity attributable to parent |  |  |  |  |  |  |  | $ 508,000 | $ (3,000) | $ 500,000
Cash Accounts Held Primarily At Financial Institution |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies Additional Information [Abstract] |  |  |  |  |  |  |  |  |  |
Concentration of credit risk |  | 17,200,000 |  |  |  |  |  |  |  |
Cash Accounts Held at Other Financial Institutions |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies Additional Information [Abstract] |  |  |  |  |  |  |  |  |  |
Concentration of credit risk |  | $ 6,000,000.0 |  |  |  |  |  |  |  |

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