Operating Expenses Denominated in Foreign Currency as a Percent

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Significant Accounting Policies (Details) (USD $)	12 Months Ended
Significant Accounting Policies (Details) (USD $)	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Operating expenses denominated in foreign currency (as a percent)	18.00%	19.00%	19.00%
Write-off of equipment	$ 5,000	$ 96,000	$ 25,000
Operating loss carryforward	66,700,000
Valuation allowance	$ 66,618,000	$ 63,528,000
Licensed Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 years
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	1 year
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	7 years
Leasehold Improvements [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	1 year
Leasehold Improvements [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	7 years
Assets Held under Capital Leases [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	1 year
Assets Held under Capital Leases [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	7 years