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INCOME TAXES (Deferred tax assets and liabilities for federal and state income taxes) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Jun. 30, 2018
--- | --- | ---
Deferred tax assets: |  |
Federal & State NOL carryforward | $ 23 | $ 23
Research & other credits | 347 | 1,517
Reserves and accruals | 431 | 438
Stock based compensation | 9 | 55
Inventory | 357 | 371
Other intangibles | 37 | 70
Other | 147 | 48
Total gross deferred tax assets | 1,351 | 2,522
Less: valuation allowance | (477) | (368)
Total deferred tax assets | 874 | 2,154
Deferred tax liabilities: |  |
Property and equipment, principally due to differing depreciation methods | (527) | (318)
Deferred state tax | (81) | (152)
Other | (6) | (6)
Total gross deferred tax liabilities | (614) | (476)
Net deferred tax assets | $ 260 | $ 1,678

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