Property and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment

5.

Property and Equipment

Property and equipment are recorded at cost and depreciated using the straight-line method over estimated useful lives ranging generally from five to seven years. Expenditures for maintenance and repairs are charged to expense as incurred. 

Property and equipment consisted of the following at:

	December 31,
	2017			2016
Lab equipment	$	645,433		$	587,366
Computers		41,333			38,903
Furniture and fixtures		55,883			55,883
Total		742,649			682,152
Accumulated depreciation		(455,758	)		(322,560	)
Property and equipment, net	$	286,891		$	359,592

Depreciation expense totaled $134,084 and $132,077 for the years ended December 31, 2017 and 2016, respectively.