Employee Stock Plans	3 Months Ended
Mar. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Employee Stock Plans	Note 11 — Employee Stock Plans 2009 Stock Plan The 2009 Stock Plan, or the 2009 Plan, was amended and restated by the Board of Directors in January 2015, in February 2017 and in March 15, 2018 and approved by the Company's stockholders on April 23, 2015, on April 26, 2017 and on April 25, 2018 to, among other things, reserve an additional 2.5 million, 1.5 million and 4.0 million shares of common stock, respectively, for issuance under the 2009 Plan. As of March 31, 2019, approximately 16.5 million shares were reserved for issuance under the 2009 Plan. On March 15, 2018, Board of Directors extended the term of the Stock Plan until March 15, 2028. 2019 Stock Plan On April 24, 2019, the Company’s Board of Directors and shareholders approved the 2019 Stock Plan, or 2019 Plan, to replace the 2009 Plan. Under the 2019 Plan, 5,000,000 shares of common stock are available for grants. The remaining balance of available shares under the 2009 Plan of 4,186,979 were cancelled as of April 24, 2019. Employee Stock Purchase Plan The 2009 Employee Stock Purchase Plan, or the 2009 ESPP, was adopted in March 2009. The 2009 ESPP was amended by the Board of Directors in January 2015 and in February 2017, and was approved by the Company's stockholders on April 23, 2015 and April 26, 2017, to reserve an additional 1.0 million and 1.5 million shares of common stock, respectively, for issuance under the 2009 ESPP. As of March 31, 2019, approximately 4.8 million shares of the Company’s common stock were reserved for issuance under the 2009 ESPP. On May 6, 2019, the Board of Directors approved the extension of the term of the 2009 ESSP to March 5, 2029.

Employee Stock Plans

3 Months Ended

Mar. 31, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Note 11 — Employee Stock Plans

2009 Stock Plan

The 2009 Stock Plan, or the 2009 Plan, was amended and restated by the Board of Directors in January 2015, in February 2017 and in March 15, 2018 and approved by the Company's stockholders on April 23, 2015, on April 26, 2017 and on April 25, 2018 to, among other things, reserve an additional 2.5 million, 1.5 million and 4.0 million shares of common stock, respectively, for issuance under the 2009 Plan. As of March 31, 2019, approximately 16.5 million shares were reserved for issuance under the 2009 Plan. On March 15, 2018, Board of Directors extended the term of the Stock Plan until March 15, 2028.

2019 Stock Plan

On April 24, 2019, the Company’s Board of Directors and shareholders approved the 2019 Stock Plan, or 2019 Plan, to replace the 2009 Plan. Under the 2019 Plan, 5,000,000 shares of common stock are available for grants. The remaining balance of available shares under the 2009 Plan of 4,186,979 were cancelled as of April 24, 2019.

Employee Stock Purchase Plan

The 2009 Employee Stock Purchase Plan, or the 2009 ESPP, was adopted in March 2009. The 2009 ESPP was amended by the Board of Directors in January 2015 and in February 2017, and was approved by the Company's stockholders on April 23, 2015 and April 26, 2017, to reserve an additional 1.0 million and 1.5 million shares of common stock, respectively, for issuance under the 2009 ESPP.

As of March 31, 2019, approximately 4.8 million shares of the Company’s common stock were reserved for issuance under the 2009 ESPP. On May 6, 2019, the Board of Directors approved the extension of the term of the 2009 ESSP to March 5, 2029.