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Summary of Significant Accounting Policies (Accounts Receivable, Property, Plant and Equipment, and Net Loss Per Share) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Property, Plant and Equipment [Line Items]
Receivables percentage	100.00%
Lab equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Computer Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	7 years
Accounting Standards Update 2016-09
Property, Plant and Equipment [Line Items]
Deferred income tax assets, net	$ 1.6

X

- Definition

Percentage of accounts receivables represented from National Institutes of Health and BARDA.

+ References

No definition available.

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- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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