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Revenue Recognition - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenues	$ 2,000,868	$ 2,644,543	$ 27,979,273	$ 33,432,852
Revenue recognized from deferred revenue beginning balance	316,000		1,300,000
ApolloBio
Disaggregation of Revenue [Line Items]
Total revenues	0		23,000,000
Revenue recognized from deferred revenue beginning balance			23,000,000
MedImmune
Disaggregation of Revenue [Line Items]
Total revenues	1,800,000		4,500,000
Revenue recognized from deferred revenue beginning balance			1,582,167
Other Counterparty
Disaggregation of Revenue [Line Items]
Total revenues	33,000		186,000
Revenue recognized from deferred revenue beginning balance			208,291
GeneOne Life Sciences
Disaggregation of Revenue [Line Items]
Revenue from Related Parties	$ 155,000	$ 104,000	$ 305,000	$ 426,000

X

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
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