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Income Taxes - Deferred Income Taxes (Details) - USD ($) $ in Thousands | Dec. 28, 2019 | Dec. 29, 2018
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 7,912 | $ 9,973
Research and development tax credit carryforwards | 14,755 | 12,500
Stock-based compensation | 2,619 | 4,360
Depreciation and amortization | 7,424 | 7,799
Capitalized research and development | 1,735 | 2,521
Deferred income on shipments to distributors | 4,018 | 5,824
Expected future cost-sharing adjustment |  | 25,257
Leases | 3,446 |
Accrued liabilities and other | 7,374 | 7,737
Deferred tax assets | 49,283 | 75,971
Less: Valuation allowance | (4,486) | (4,975)
Deferred tax assets, net | 44,797 | 70,996
Deferred tax liabilities: |  |
Acquired intangible assets | 16,621 | 20,656
Depreciation and amortization | 4,969 | 4,604
Leases | 3,166 |
Long-term debt | 5,741 | 8,080
Prepaid expenses and other | 2,424 | 2,142
Deferred tax liabilities | 32,921 | 35,482
Net deferred tax assets | $ 11,876 | $ 35,514

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