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INCOME TAXES - Reconciliation (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 30, 2022 | Sep. 30, 2022 | Jul. 01, 2022 | Apr. 01, 2022 | Dec. 31, 2021 | Oct. 01, 2021 | Jul. 02, 2021 | Apr. 02, 2021 | Dec. 30, 2022 | Dec. 31, 2021 | Jan. 01, 2021
Provision for income taxes reconciliation |  |  |  |  |  |  |  |  |  |  |
Computed "expected" federal income tax expense |  |  |  |  |  |  |  |  | $ (2,405) | $ (2,605) | $ (4,130)
Permanent differences |  |  |  |  |  |  |  |  | 24 | 18 | 122
Nondeductible executive compensation |  |  |  |  |  |  |  |  | 711 | 1,349 | 1,386
Stock options and disqualifying dispositions |  |  |  |  |  |  |  |  | 576 | (1,276) | 4
Energy efficient building deduction |  |  |  |  |  |  |  |  | (1,378) | (558) | (738)
Current and deferred state income tax expense, net of federal benefit |  |  |  |  |  |  |  |  | (111) | (660) | (1,205)
Adjustment for uncertain tax positions |  |  |  |  |  |  |  |  |  |  | (142)
Research and development tax credit |  |  |  |  |  |  |  |  | (517) | (761) | (527)
Federal rate differential on NOL carryback |  |  |  |  |  |  |  |  |  | (579) |
Change in valuation allowance |  |  |  |  |  |  |  |  |  | 1,105 |
Other |  |  |  |  |  |  |  |  | 96 | (20) | 57
Total provision for income taxes | $ 2,584 | $ (1,526) | $ (1,673) | $ (2,389) | $ 1,370 | $ (236) | $ (3,663) | $ (1,458) | $ (3,004) | $ (3,987) | $ (5,173)

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