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Collaborative Arrangement, Notice Given, Period to Expiration

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Entity wide net accounts receivable number of major customer.

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Fair value assets liabilities transfer between levels.

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Increase (Decrease) in Collaboration Revenue

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Liquid Investment Considered To Be Cash Equivalents, Maximum Maturity

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Summary Of Significant Accounting Policies [Line Items]

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Upfront payment.

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Weighted Average Market Yield Percentage

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of revenue recognized that was previously reported as deferred or unearned revenue.

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The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares.

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Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method.

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Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements.

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Summary Of Significant Accounting Policies (Narrative) (Details)	1 Months Ended		3 Months Ended													12 Months Ended
	Dec. 31, 2016 USD ($)	Sep. 30, 2013 USD ($)	Dec. 31, 2016 USD ($) $ / shares	Sep. 30, 2016 USD ($) $ / shares	Jun. 30, 2016 USD ($) $ / shares	Mar. 31, 2016 USD ($) $ / shares	Dec. 31, 2015 USD ($) customer	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) customer $ / shares	Dec. 31, 2014 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Basic and diluted net loss per share \| $ / shares			$ (0.21)	$ (0.19)	$ (0.21)	$ (0.23)
Fair value assets liabilities transfer between levels																$ 0
Future cash flows weighted average market yield	10.60%		10.60%				13.50%									10.60%	13.50%
Highly liquid investments considered to be cash equivalents, maximum maturity																3 months
Impairment charges on investments																$ 0	$ 0	$ 0
Long-term restricted cash	$ 4,500,000		$ 4,500,000				$ 4,500,000									$ 4,500,000	$ 4,500,000
Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of individual customers \| customer							4										4
Accounts Receivable [Member] \| Domestic Customers [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage																84.00%	64.00%
Lab Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful life																3 years
Building [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful life																30 years
Minimum [Member] \| Letter of Credit [Member]
Summary Of Significant Accounting Policies [Line Items]
Letter of credit expiration																1 year
Minimum [Member] \| Accounts Receivable [Member] \| Customer A [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage																10.00%	10.00%
Minimum [Member] \| Accounts Receivable [Member] \| Customer B [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage																10.00%	10.00%
Minimum [Member] \| Accounts Receivable [Member] \| Customer C [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage																10.00%	10.00%
Minimum [Member] \| Accounts Receivable [Member] \| Customer D [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage																	10.00%
Minimum [Member] \| Computer Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful life																2 years
Minimum [Member] \| Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful life																3 years
Minimum [Member] \| Furniture and Fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful life																3 years
Maximum [Member] \| Computer Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful life																3 years
Maximum [Member] \| Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful life																5 years
Maximum [Member] \| Furniture and Fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful life																7 years
Roche Agreement [Member]
Summary Of Significant Accounting Policies [Line Items]
Non-refundable upfront payment		$ 35,000,000
Amortization				$ 3,600,000	$ 3,600,000	$ 3,600,000	$ 3,600,000	$ 3,600,000	$ 3,600,000	$ 3,600,000	$ 1,700,000	$ 1,700,000	$ 1,700,000	$ 1,700,000	$ 1,700,000
Additional contractual revenue being recognized in the period																	$ 7,600,000
Basic and diluted net loss per share \| $ / shares																	$ (0.10)
Collaborative arrangement expiration	Feb. 10, 2017
Period until expiration upon notice given	60 days
Deferred revenue, revenue recognized			$ 1,300,000				$ 20,000,000		$ 10,000,000