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Inventories (Tables)
 3 Months Ended
Mar. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories consist of the following: 
 
March 31, 2018
 
December 31, 2017
Purchased components
$
568,930

 
$
505,293

Finished goods
1,289,722

 
1,637,268

 
$
1,858,652

 
$
2,142,561