Organization and Summary of Significant Accounting Policies (Estimated Useful Lives of Property Plant And Equipment) (Details) |
12 Months Ended |
---|---|
Dec. 29, 2017 | |
Building [Member] | |
Property, Plant and Equipment [Line Items] | |
Estimated useful lives | 40 years |
Lab equipment [Member] | |
Property, Plant and Equipment [Line Items] | |
Estimated useful lives | 5 years |
Furniture and fixtures [Member] | |
Property, Plant and Equipment [Line Items] | |
Estimated useful lives | 5 years |
Computer equipment and software [Member] | |
Property, Plant and Equipment [Line Items] | |
Estimated useful lives | 3 years |
Leasehold improvements [Member] | Minimum [Member] | |
Property, Plant and Equipment [Line Items] | |
Estimated useful lives | 7 years |
Leasehold improvements [Member] | Maximum [Member] | |
Property, Plant and Equipment [Line Items] | |
Estimated useful lives | 15 years |