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Property and Equipment (Tables)
 3 Months Ended
Mar. 31, 2018
Property Plant And Equipment [Abstract]  
Property Plant And Equipment, Net

 

Property and equipment, net consist of the following:

 

 

 

March 31,

 

 

December 31,

 

 

 

2018

 

 

2017

 

Computers and computer equipment

 

$

1,162,948

 

 

$

936,317

 

Furniture and office equipment

 

 

171,586

 

 

 

161,434

 

Manufacturing equipment and engineering tools

 

 

2,190,366

 

 

 

2,041,238

 

Leasehold improvements

 

 

142,982

 

 

 

131,188

 

 

 

 

3,667,882

 

 

 

3,270,177

 

Less:  accumulated depreciation and amortization

 

 

(1,843,460

)

 

 

(1,688,363

)

 

 

$

1,824,422

 

 

$

1,581,814