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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories

Inventories consisted of the following at December 31, 2020 and 2019:

 

    December 31, 2020     December 31, 2019  
Raw material and component parts   $ 3,186,426     $ 4,481,611  
Work-in-process     1,907       35,858  
Finished goods     6,974,291       4,906,956  
Subtotal     10,162,625       9,424,425  
Reserve for excess and obsolete inventory     (1,960,351 )     (4,144,013 )
Total inventories   $ 8,202,274     $ 5,280,412