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Major Customers and Concentration of Credit Risk (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Concentration Risk [Line Items]
Revenue	$ 35,368,361	$ 40,572,111	$ 10,456,766
Revenue | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
MedImmune
Concentration Risk [Line Items]
Revenue	$ 1,518,639	$ 16,037,731	$ 0
Accounts receivable	$ 1,200,000	$ 1,500,000
MedImmune | Revenue | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	4.00%	40.00%	0.00%
MedImmune | Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	7.00%	20.00%
DARPA
Concentration Risk [Line Items]
Revenue	$ 26,602,183	$ 11,582,623	$ 123,605
Accounts receivable	12,100,000	$ 4,000,000
Unbilled receivables	$ 6,800,000
Estimated collection period for unbilled receivables	12 months
DARPA | Revenue | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	75.00%	28.00%	1.00%
DARPA | Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	73.00%	54.00%
Roche
Concentration Risk [Line Items]
Revenue	$ 4,917,929	$ 10,778,688	$ 7,357,346
Accounts receivable	$ 2,400,000	$ 1,600,000
Roche | Revenue | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	27.00%	70.00%
Roche | Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	15.00%	22.00%
NIAID
Concentration Risk [Line Items]
Revenue	$ 118,171	$ 901,475	$ 1,229,084
NIAID | Revenue | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	0.00%	2.00%	12.00%
GeneOne (affiliated entity)
Concentration Risk [Line Items]
Revenue	$ 1,188,432	$ 450,000	$ 479,464
GeneOne (affiliated entity) | Revenue | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	4.00%	1.00%	5.00%
All other
Concentration Risk [Line Items]
Revenue	$ 1,023,007	$ 821,594	$ 1,267,267
All other | Revenue | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	3.00%	2.00%	12.00%
Minimum | DARPA
Concentration Risk [Line Items]
Age of unbilled receivables	1 month
Maximum | DARPA
Concentration Risk [Line Items]
Age of unbilled receivables	9 months

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