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Note 5 - Property and Equipment - Property and Equipment (Details) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Buildings | $ 493,000 | $ 493,000 |
Machinery and equipment | 12,227,000 | 11,231,000 |
Office furniture and equipment | 1,390,000 | 1,260,000 |
Leasehold improvements | 508,000 | 508,000 |
Software | 438,000 | 373,000 |
| 15,056,000 | 13,865,000 |
Less accumulated depreciation and amortization | (11,113,000) | (10,621,000) |
Total net property and equipment | $ 3,943,000 | $ 3,244,000 | [1]
[1] | The condensed consolidated balance sheet as of December 31, 2018 has been prepared using information from the audited consolidated balance sheet as of that date.

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