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Income Taxes (Schedule of Deferred Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 28, 2018 | Dec. 29, 2017
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 146,701 | $ 244,205
Tax credit carryforwards | 98,467 | 66,770
Book over tax depreciation and amortization | 29,929 | 39,472
Amortization of deferred stock compensation – non-qualified | 11,366 | 8,966
Accruals and reserves not currently deductible | 10,425 | 4,914
Deferred revenue | 5,474 | 53,543
Other assets | 1,140 | 1,088
Total deferred tax assets | 303,502 | 418,958
Valuation allowance | (58,112) | (418,958)
Net deferred tax assets | 245,390 | 0
Deferred tax liabilities: |  |
Operating lease right-of-use assets | (1,279) | 0
Total deferred tax liabilities | (1,279) | 0
Net deferred taxes | $ 244,111 | $ 0

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