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Inventories | 6 Months Ended
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Jun. 30, 2020
Inventory Disclosure [Abstract] |
Inventories | NOTE 2. INVENTORIES Inventories consisted of the following at June 30, 2020 and December 31, 2019:
|  | June 30, 2020 |  |  | December 31, 2019 |
Raw material and component parts |  | $ | 2,575,710 |  |  | $ | 4,481,611 |
Work-in-process |  |  | 30,679 |  |  |  | 35,858 |
Finished goods |  |  | 4,146,308 |  |  |  | 4,906,956 |
Subtotal |  |  | 6,752,697 |  |  |  | 9,424,425 |
Reserve for excess and obsolete inventory |  |  | (2,000,412 | ) |  |  | (4,144,013 | )
Total |  | $ | 4,752,285 |  |  | $ | 5,280,412 |
Finished goods inventory includes units held by potential customers and sales agents for test and evaluation purposes. The cost of such units totaled $140,158 and $80,711 as of June 30, 2020 and December 31, 2019, respectively.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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