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Fixed Assets
12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Fixed Assets

(3) Fixed Assets

 

Depreciation and amortization expense for the years ended December 31, 2017, 2016, and 2015 was $175,643, $188,501 and $140,170, respectively. Fixed assets and their estimated useful lives as of December 31, 2017 and 2016 are as follows:

 

    2017     2016     Estimated useful life
                 
Equipment and furniture   $ 1,372,449     $ 1,366,401     5 years
Trade show materials     775,654       775,654     5 years
                    Life of lease or estimated
Leasehold Improvements     584,967       584,466     life of asset if shorter
      2,733,070       2,726,521      
                     
Less accumulated depreciation
and amortization
    (2,250,509 )     (2,074,866 )    
    $ 482,561     $ 651,655