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INCOME TAXES (Deferred tax assets and liabilities for federal and state income taxes) (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Jun. 30, 2019
--- | --- | ---
Deferred tax assets: |  |
Federal & State NOL carryforward | $ 21 | $ 23
Research & other credits | 65 | 347
Reserves and accruals | 438 | 431
Stock based compensation | 110 | 9
Unrealized losses | 455 |
Inventory | 334 | 357
Other intangibles |  | 37
Other |  | 147
Total gross deferred tax assets | 1,423 | 1,351
Less: valuation allowance | (543) | (477)
Total deferred tax assets | 880 | 874
Deferred tax liabilities: |  |
Property and equipment, principally due to differing depreciation methods | (577) | (527)
Deferred state tax | (33) | (81)
Other | (11) | (6)
Total gross deferred tax liabilities | (621) | (614)
Net deferred tax assets | $ 259 | $ 260

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