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Organization and Summary of Significant Accounting Policies (Estimated Useful Lives of Property Plant And Equipment) (Details)	12 Months Ended
	Dec. 28, 2018
Laboratory equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years
Office equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Computer equipment and software
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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