Note 10 - Retirement Savings Plan (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 25, 2021 |
Dec. 26, 2020 |
|
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 2.00% | 2.00% |
| Defined Contribution Plan, Cost | $ 34 | $ 64 |
| Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 0.50% | 0.50% |