XML 34 R19.htm IDEA: XBRL DOCUMENT v3.10.0.1
Defined Contribution Plan
12 Months Ended
Dec. 31, 2018
Defined Contribution Pension And Other Postretirement Plans Disclosure [Abstract]  
Defined Contribution Plan

12.       Defined Contribution Plan

The Company sponsors a retirement plan in which substantially all of its full-time employees in the United States and certain other foreign countries are eligible to participate. Eligible participants may contribute a percentage of their annual compensation to this plan, subject to statutory limitations. The Company recorded $2.9 million, $2.1 million, and $1.5 million as contribution expenses for the years ended December 31, 2018, 2017, and 2016, respectively.