Property and Equipment
 12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant, and Equipment and Intangible Assets [Text Block]
(5)
Property and Equipment
 
Property and equipment consisted of the following:
 
 
 
December 31,
2015
 
December 31,
2014
 
Computer equipment and software
 
$
43,361
 
$
41,792
 
Lab and office equipment
 
 
1,041,735
 
 
1,014,615
 
Furniture and fixtures
 
 
51,404
 
 
51,404
 
 
 
 
1,136,500
 
 
1,107,811
 
 
 
 
 
 
 
 
 
Less accumulated depreciation
 
 
(1,060,750)
 
 
(1,034,029)
 
 
 
$
75,750
 
$
73,782
 
 
Depreciation expense for the years ended December 31, 2015 and 2014 was $27,000 and $15,000.