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Balance Sheet Components (Details) (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Jan. 01, 2012
Inventories:
Raw materials	$ 30	$ 52
Work-in-process	2,337	3,261
Finished goods	360	451
Inventories	2,727	3,764
Other current assets:
Prepaid expenses	824	575
Other	38	38
Other current assets	862	613
Accrued liabilities:
Employee related accruals	1,324	845
Other	219	273
Accrued liabilities	$ 1,543	$ 1,118

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).

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