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Note 16 - Employee Benefit Plans
 12 Months Ended
Dec. 31, 2022
Notes to Financial Statements  
Compensation and Employee Benefit Plans, Other than Share-Based Compensation [Text Block]

16.

Employee Benefit Plans

 

We maintain a defined contribution retirement plan (“401(k) plan”) for our U.S. employees that provides for a matching contribution by us. All full time U.S. employees are eligible to participate in the 401(k) plan. We made matching contributions of $341,245, $274,759 and $197,214 for the years ended December 31, 2022, 2021 and 2020, respectively.

 

Also, all employees, excluding executive officers, are eligible to participate in the ESPP. Under the ESPP, employees can elect to have up to 10% of their annual wages withheld to purchase our common stock up to a fair market value of $10,000. The amounts deducted and accumulated by each participant are used to purchase shares of common stock on or as promptly as practicable after the last business day of each month. The price of stock purchased under the ESPP is approximately 85% of the fair market value per share of our common stock on the purchase date. Employees contributed $107,995 to purchase 3,280 shares of common stock in 2022, $79,095 to purchase 2,241 shares of common stock in 2021 and $106,775 to purchase 9,209 shares of common stock in 2020 under the ESPP. The ESPP covers up to 100,000 shares of common stock. Our charge to expense associated with the ESPP was $35,348, $28,937 and $31,748 in 2022, 2021, and 2020 respectively.