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Note 13 - Restructuring Costs (Details Textual) |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Oct. 29, 2018 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) ft² | Mar. 31, 2018 USD ($) | Mar. 31, 2019 USD ($) ft² | Mar. 31, 2018 USD ($)
Restructuring and Related Cost, Incurred Cost (Gain) |  |  | $ 368,000 |  | $ 924,000 |
Inventory Write-down |  |  |  |  | 2,574,000 | $ 1,762,000
Fixed Asset Impairment and Accelerated Depreciation Expense |  |  |  |  | 228,000 |
Forecast [Member] |  |  |  |  |  |
Proceeds from Sale of Manufacturing Facility, Gross |  | $ 12,000,000 |  |  |  |
Closure of Lighting Facility in New Windsor, New York [Member] |  |  |  |  |  |
Expected Annual Savings from Closure of Facility | $ 4,000,000 |  |  |  |  |
Restructuring and Related Cost, Expected Cost, Total | 200,000 |  |  |  |  |
Expected Write-down of Inventory | $ 600,000 |  |  |  |  |
Restructuring and Related Cost, Incurred Cost (Gain) |  |  |  |  | 769,000 |
Inventory Write-down |  |  |  |  | 919,000 |
Sell Manufacturing Facility In New Windsor, New York [Member] | Forecast [Member] |  |  |  |  |  |
Proceeds from Sale of Manufacturing Facility, Gross |  | $ 12,000,000 |  |  |  |
Closure of Leased Facility in Hawthorne, California [Member] |  |  |  |  |  |
Restructuring and Related Cost, Incurred Cost (Gain) |  |  |  |  | 155,000 |
Inventory Write-down |  |  |  |  | $ 148,000 |
Area of Real Estate Property | ft² |  |  | 12,000 |  | 12,000 |
Closure of Leased Facility in Hawthorne, California [Member] | Cost of Sales [Member] |  |  |  |  |  |
Inventory Write-down |  |  |  |  | $ 1,067,000 |

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