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Note 10 - Provision for Taxes - Net Deferred Tax Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 25, 2021
Valuation reserves | $ 1,167 | $ 1,248
Stock based compensation | 389 | 329
Federal and state credits | 674 | 339
Lease obligation | 2,252 | 515
Other | 4 | 34
Capitalized research costs | 605 | 0
Total assets | 5,091 | 2,465
Property and equipment | (1,502) | (1,474)
Goodwill and intangible assets | (5,347) | (4,973)
Lease – right of use asset | (2,127) | (517)
Prepaid insurance | (280) | (237)
Total liabilities | (9,256) | (7,201)
Beginning balance | (23) | (27)
(Increase) Decrease during period | (328) | 4
Ending balance | (351) | (23)
Deferred Tax Liabilities, Net, Total | $ (4,516) | $ (4,759)

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