Note 13 - Stock-based Compensation - Stock Option Compensation (Details) - USD ($) | 3 Months Ended |
Jun. 27, 2021 | Jun. 28, 2020 |
Allocated Share Based Compensation Expense | $ 132,000 | $ 86,000 |
Share-based Payment Arrangement, Option [Member] | | |
Allocated Share Based Compensation Expense | 33,000 | 15,000 |
Share-based Payment Arrangement, Option [Member] | Cost of Sales [Member] | | |
Allocated Share Based Compensation Expense | 9,000 | 6,000 |
Share-based Payment Arrangement, Option [Member] | Marketing and Administrative Expenses [Member] | | |
Allocated Share Based Compensation Expense | 24,000 | 9,000 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2019 [Member] | | |
Allocated Share Based Compensation Expense | 0 | 6,000 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2019 [Member] | Cost of Sales [Member] | | |
Allocated Share Based Compensation Expense | 0 | 3,000 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2019 [Member] | Marketing and Administrative Expenses [Member] | | |
Allocated Share Based Compensation Expense | 0 | 3,000 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2020 [Member] | | |
Allocated Share Based Compensation Expense | 7,000 | 8,000 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2020 [Member] | Cost of Sales [Member] | | |
Allocated Share Based Compensation Expense | 3,000 | 3,000 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2020 [Member] | Marketing and Administrative Expenses [Member] | | |
Allocated Share Based Compensation Expense | 4,000 | 5,000 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2021 [Member] | | |
Allocated Share Based Compensation Expense | 20,000 | 1,000 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2021 [Member] | Cost of Sales [Member] | | |
Allocated Share Based Compensation Expense | 4,000 | 0 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2021 [Member] | Marketing and Administrative Expenses [Member] | | |
Allocated Share Based Compensation Expense | 16,000 | 1,000 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2022 [Member] | | |
Allocated Share Based Compensation Expense | 6,000 | 0 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2022 [Member] | Cost of Sales [Member] | | |
Allocated Share Based Compensation Expense | 2,000 | 0 |
Share-based Payment Arrangement, Option [Member] | Fiscal Year 2022 [Member] | Marketing and Administrative Expenses [Member] | | |
Allocated Share Based Compensation Expense | 4,000 | 0 |
Non-vested Stock Grants [Member] | Selling, General and Administrative Expenses [Member] | | |
Allocated Share Based Compensation Expense | 99,000 | 71,000 |
Non-vested Stock Grants [Member] | Selling, General and Administrative Expenses [Member] | Employee [Member] | | |
Allocated Share Based Compensation Expense | 39,000 | 22,000 |
Non-vested Stock Grants [Member] | Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | | |
Allocated Share Based Compensation Expense | 60,000 | 49,000 |
Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member] | Selling, General and Administrative Expenses [Member] | | |
Allocated Share Based Compensation Expense | 0 | 37,000 |
Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member] | Selling, General and Administrative Expenses [Member] | Employee [Member] | | |
Allocated Share Based Compensation Expense | 0 | 18,000 |
Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member] | Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | | |
Allocated Share Based Compensation Expense | 0 | 19,000 |
Non-vested Stock Grants [Member] | Fiscal Year 2020 [Member] | Selling, General and Administrative Expenses [Member] | | |
Allocated Share Based Compensation Expense | 30,000 | 30,000 |
Non-vested Stock Grants [Member] | Fiscal Year 2020 [Member] | Selling, General and Administrative Expenses [Member] | Employee [Member] | | |
Allocated Share Based Compensation Expense | 0 | 0 |
Non-vested Stock Grants [Member] | Fiscal Year 2020 [Member] | Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | | |
Allocated Share Based Compensation Expense | 30,000 | 30,000 |
Non-vested Stock Grants [Member] | Fiscal Year 2021 [Member] | Selling, General and Administrative Expenses [Member] | | |
Allocated Share Based Compensation Expense | 52,000 | 4,000 |
Non-vested Stock Grants [Member] | Fiscal Year 2021 [Member] | Selling, General and Administrative Expenses [Member] | Employee [Member] | | |
Allocated Share Based Compensation Expense | 22,000 | 4,000 |
Non-vested Stock Grants [Member] | Fiscal Year 2021 [Member] | Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | | |
Allocated Share Based Compensation Expense | 30,000 | 0 |
Non-vested Stock Grants [Member] | Fiscal Year 2022 [Member] | Selling, General and Administrative Expenses [Member] | | |
Allocated Share Based Compensation Expense | 17,000 | 0 |
Non-vested Stock Grants [Member] | Fiscal Year 2022 [Member] | Selling, General and Administrative Expenses [Member] | Employee [Member] | | |
Allocated Share Based Compensation Expense | 17,000 | 0 |
Non-vested Stock Grants [Member] | Fiscal Year 2022 [Member] | Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | | |
Allocated Share Based Compensation Expense | $ 0 | $ 0 |