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Collaboration Agreements (Genentech Collaboration) (Details) - Genentech [Member] - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Mar. 31, 2017 | 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 Sharing Agreement, Profit Threshold | $ 200.0 |
Profit Sharing Tier Three [Member] |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |
Percent of profits | 30.00% |
Profit Sharing Agreement, Profit Threshold | $ 400.0 |
Q4 '16 [Member] |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |
Royalty revenue | 1.1 |
Q1 '17 [Member] |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |
Royalty revenue | $ 1.2 |

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- Definition 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 + Details
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