Employee Benefit Plans	12 Months Ended
Dec. 31, 2023
Employee Benefit Plans
Employee Benefit Plans	(9) Employee Benefit Plans 401(k) Defined Contribution Plan The Company sponsors a 401(k) defined-contribution plan covering all employees. Participants are permitted to contribute up to 100% of their eligible annual pretax compensation up to an established federal limit on aggregate participant contributions. Discretionary contributions made by the Company, if any, are determined annually by the board of directors. Effective January 1, 2020, the Company matched 50% of employees’ contributions up to 6%, subject to a maximum annual amount. The Company’s contributions were $0.5 million, $0.4 million and $0.3 million for the years ended December 31, 2023, 2022 and 2021, respectively. Participants are immediately vested in their own contributions to the plan and are fully vested in discretionary profit sharing made by the Company after three years of service. 2019 Employee Stock Purchase Plan In November 2019, the Company adopted the 2019 Employee Stock Purchase Plan (the “ESPP”). At December 31, 2023, 518,350 shares were available for future issuance under the ESPP. The ESPP is subject to an annual increase, subject to prior approval by the Company’s board of directors, equal to the least of (i) 107,887 shares of common stock, (ii) 1% of the shares outstanding on the final day of the immediately preceding calendar year, and (iii) such smaller number of shares as determined by the board of directors. The ESPP provides the opportunity to purchase the Company’s common stock at a 15% discount to the market price through payroll deductions. As of December 31, 2023, 2022 and 2021, 10,602, 4,523 and 3,163 shares, respectively, have been issued under the ESPP.

Employee Benefit Plans

12 Months Ended

Dec. 31, 2023

(9) Employee Benefit Plans

401(k) Defined Contribution Plan

The Company sponsors a 401(k) defined-contribution plan covering all employees. Participants are permitted to contribute up to 100% of their eligible annual pretax compensation up to an established federal limit on aggregate participant contributions. Discretionary contributions made by the Company, if any, are determined annually by the board of directors. Effective January 1, 2020, the Company matched 50% of employees’ contributions up to 6%, subject to a maximum annual amount. The Company’s contributions were $0.5 million, $0.4 million and $0.3 million for the years ended December 31, 2023, 2022 and 2021, respectively. Participants are immediately vested in their own contributions to the plan and are fully vested in discretionary profit sharing made by the Company after three years of service.

2019 Employee Stock Purchase Plan

In November 2019, the Company adopted the 2019 Employee Stock Purchase Plan (the “ESPP”). At December 31, 2023, 518,350 shares were available for future issuance under the ESPP. The ESPP is subject to an annual increase, subject to prior approval by the Company’s board of directors, equal to the least of (i) 107,887 shares of common stock, (ii) 1% of the shares outstanding on the final day of the immediately preceding calendar year, and (iii) such smaller number of shares as determined by the board of directors. The ESPP provides the opportunity to purchase the Company’s common stock at a 15% discount to the market price through payroll deductions. As of December 31, 2023, 2022 and 2021, 10,602, 4,523 and 3,163 shares, respectively, have been issued under the ESPP.