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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jul. 01, 2019
Cash, Uninsured Amount | $ 2,300 | $ 3,700 |
Depreciation, Total | 5,200 | 6,000 |
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset | $ 0 |  |
Standard Warranty Extended Term for Exceptions (Year) | 10 years |  |
Defined Contribution Plan, Cost | $ 1,400 | 1,300 |
Research and Development Expense, Total | $ 3,700 | $ 3,600 |
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares (in shares) | 1,029,000 | 368,000 |
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Ending Balance | $ (100) | $ 100 |
Operating Lease, Right-of-Use Asset | 11,579 | 8,663 |
Operating Lease, Liability, Total | 12,314 | 9,397 |
Retained Earnings (Accumulated Deficit), Ending Balance | (1,405) | (1,920) |
Accounting Standards Update 2016-02 [Member] |  |  |
Operating Lease, Right-of-Use Asset |  |  | $ 10,400
Operating Lease, Liability, Total |  |  | 10,800
Accounting Standards Update 2016-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Retained Earnings (Accumulated Deficit), Ending Balance |  |  | $ 400
Other Expense [Member] |  |  |
Foreign Currency Transaction Gain (Loss), before Tax, Total | $ 200 | $ 500 |
Maximum [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 20 years |  |
Standard Warranty Term (Year) | 5 years |  |
Minimum [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 5 years |  |
Standard Warranty Term (Year) | 1 year |  |
Leasehold Improvements [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life (Year) | 15 years |  |

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