Subsequent Event	12 Months Ended
Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Event	12. Subsequent Event In February 2020, the Company entered into an amendment to the lease agreement dated October 4, 2018 to lease approximately 31,608 square feet of additional corporate office space in San Diego, California with total minimum lease payments of $25.3 million over an initial term of 10 years and 7 months. This operating lease is expected to commence in the third quarter of 2020, but may commence earlier if the lessor makes the space available for use earlier than anticipated.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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