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Inventories (Tables)
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories consist of the following: 
 
March 31, 2019
 
December 31, 2018
Purchased components
$
1,710,368

 
$
1,767,674

Finished goods
783,900

 
1,094,190

 
$
2,494,268

 
$
2,861,864