Employee Benefit Plans

12 Months Ended

Dec. 31, 2019

Retirement Benefits [Abstract]

Employee Benefit Plans

Employee Benefit PlansThe Company maintains a defined contribution 401(k) retirement plan, which covers all eligible US employees. Employees are eligible to participate in the plan on the first of the month following their date of hire. Under the 401(k) retirement plan, participating employees may defer up to 100% of their pre-tax salary, but not more than statutory limits. In October 2017, the Company adopted a 401(k) matching program for its US employees. The Company matches 100% of the first 3% of participating employee contributions and 50% of the next 2% of participating employee contributions, subject to applicable IRC limits. The Company incurred costs of $1,238 and

$645 related to the Company match applicable to employee contributions for the years ended December 31, 2019 and 2018, respectively. The Company's contributions are made in cash. The Company's common stock is not currently an investment option available to participants in the 401(k) retirement plan. As of December 31, 2019, approximately $178 is recorded in accrued expenses related to the Company match.

For Norway and UK employees, the Company maintains defined contribution pension plans which meet statutory requirements of those jurisdictions. The Company incurred costs of $19 and $81 related to the pension plans for the years ended December 31, 2019 and 2018, respectively.