Note 11 - Retirement Plan (Details Textual) - USD ($) |
12 Months Ended | |
---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 4.00% | |
Defined Contribution Plan, Cost | $ 38,000 | $ 39,000 |