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Balance Sheet Components (Details) - USD ($) $ in Thousands | Jun. 28, 2015 | Dec. 28, 2014
--- | --- | ---
Inventories: |  |
Raw material | $ 0 | $ 0
Work-in-process | 1,798 | 1,191
Finished goods | 1,203 | 3,761
Inventories | 3,001 | 4,952
Other current assets: |  |
Prepaid expenses | 765 | 1,042
Other | 108 | 104
Other current assets | 873 | 1,146
Accrued liabilities: |  |
Employee related accruals | 1,792 | 1,356
Restructuring accruals - See Note 12 | 169 | 0
Other | 108 | 218
Accrued liabilities | $ 2,069 | $ 1,574

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