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Collaboration Agreements (Genentech Collaboration) (Details) - Genentech [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2015
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of share of the Company in promotions					25.00%
Profit Sharing Tier One [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percent of profits			50.00%
Profit threshold			$ 200,000
Profit Sharing Tier Three [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percent of profits			30.00%
Profit threshold			$ 400,000
COTELLIC [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Royalty revenue	$ 1,367	$ 1,042	3,665	$ 1,172
COTELLIC [Member] | Q4 '16 [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Royalty revenue			$ 1,100

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Revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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