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Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In February 2019, the Company entered into an agreement for a non-cancellable operating lease for new office space in Santa Clara, California. The Company plans to take possession of the Santa Clara office space for its corporate headquarters and move its corporate headquarters and related operations in the second quarter of 2019 concurrent with the termination of its Mountain View, California office lease. From June 1, 2019 through October 15, 2028, total minimum lease payments under the lease agreement are $14.3 million, with lease payments ranging from $1.4 million to $1.8 million per year.

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No definition available.

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- Definition

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.

+ References

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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