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Note 4 - Inventories (Details Textual) - USD ($) | Mar. 31, 2020 | Dec. 31, 2019
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Inventory Valuation Reserves, Ending Balance | $ 768,000 | $ 768,000
Slow Moving Medical Finished Goods [Member] |  |
Inventory Valuation Reserves, Ending Balance | $ 450,000 |
Slow Moving Dental Finished Goods [Member] |  |
Inventory Valuation Reserves, Ending Balance |  | $ 318,000

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- Details
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- Details
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Balance Type: |
Period Type: |