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Patents
 12 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Patents

6. Patents

Included in other noncurrent assets at December 31, 2019 and 2018 are capitalized patent costs as follows:

 

 

2019

 

2018

 

 

 

 

 

 

 

 

 

Patent costs

 

$

477,149

 

$

533,496

 

Less accumulated amortization

 

 

(102,227

)

 

(84,429

)

 

 

$

374,922

 

$

449,067

 


Amortization expense for the year ended December 31, 2019 and 2018 amounted to $19,693 and $23,319, respectively. During the year ended December 31, 2019 and 2018, the Company recorded an expense of $66,234 and $105,665 for the impairment of patents it determined had no future economic value.