Note 16 - Employee Benefit Plan	9 Months Ended
Sep. 30, 2021
Notes to Financial Statements
Defined Contribution Plan [Text Block]	16. Employee benefit plan The Company sponsors a 401(k) defined contribution plan for its employees. This plan provides for pre-tax and post-tax contributions for all employees. Employee contributions are voluntary. Employees may contribute up to 100% of their annual compensation to this plan, as limited by an annual maximum amount as determined by the Internal Revenue Service. The Company matches employee contributions in amounts to be determined at the Company’s sole discretion. The Company made $237,000 and $587,000 in contributions to the plan for the three and nine months ended September 30, 2021, respectively, and $89,000 and $268,000 for the three and nine months ended September 30, 2020, respectively.

Note 16 - Employee Benefit Plan

9 Months Ended

Sep. 30, 2021

16. Employee benefit plan

The Company sponsors a 401(k) defined contribution plan for its employees. This plan provides for pre-tax and post-tax contributions for all employees. Employee contributions are voluntary. Employees may contribute up to 100% of their annual compensation to this plan, as limited by an annual maximum amount as determined by the Internal Revenue Service. The Company matches employee contributions in amounts to be determined at the Company’s sole discretion. The Company made $237,000 and $587,000 in contributions to the plan for the three and nine months ended September 30, 2021, respectively, and $89,000 and $268,000 for the three and nine months ended September 30, 2020, respectively.