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Inventories (Tables)
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of the following:

 
December 31,
 
2019
 
2018
Purchased components
$
720,209

 
$
1,767,674

Finished goods
443,505

 
1,094,190

 
$
1,163,714

 
$
2,861,864