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Income Taxes - Deferred Income Taxes (Details) - USD ($) $ in Thousands | Dec. 29, 2018 | Dec. 30, 2017
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 9,973 | $ 12,925
Research and development tax credit carryforwards | 12,500 | 12,322
Stock-based compensation | 4,360 | 5,256
Depreciation and amortization | 7,799 |
Capitalized research and development | 2,521 | 3,468
Deferred income on shipments to distributors | 5,824 | 7,070
Expected future cost-sharing adjustment | 25,257 | 21,582
Accrued liabilities and other | 7,737 | 6,999
Deferred tax assets | 75,971 | 69,622
Less: Valuation allowance | (4,975) | (6,518)
Deferred tax assets, net | 70,996 | 63,104
Deferred tax liabilities: |  |
Acquired intangible assets | 20,656 | 13,884
Depreciation and amortization | 4,604 | 1,274
Convertible debt | 8,080 | 10,351
Prepaid expenses and other | 2,142 | 1,421
Deferred tax liabilities | 35,482 | 26,930
Net deferred tax assets | $ 35,514 | $ 36,174

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