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Major Customers and Concentration of Credit Risk (Tables)
 12 Months Ended
Dec. 31, 2014
Risks and Uncertainties [Abstract]  
Schedule of major customers and concentration risks
Customer
2014
 
% of Total
Revenue
 
2013
 
% of Total
Revenue
 
2012
 
% of Total
Revenue
Roche
$
7,357,346

 
70
%
 
$
9,181,759

 
68
%
 
$
—

 
—
%
NIAID
1,229,084

 
12

 
2,090,939

 
16

 
2,831,115

 
69

GeneOne (affiliated entity)
479,464

 
5

 
425,000

 
3

 
577,467

 
14

NIH Research Project Grant
694,457

 
6

 
152,499

 
1

 
—

 
—

All other
696,415

 
7

 
1,617,149

 
12

 
710,070

 
17

Total Revenue
$
10,456,766

 
100
%
 
$
13,467,346

 
100
%
 
$
4,118,652

 
100
%