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Summary of Significant Accounting Policies (Cash, Cash Equivalents and Investments) (Details) - USD ($)
$ in Thousands
Jan. 02, 2021
Dec. 28, 2019
Schedule of Investments [Line Items]    
Cash and cash equivalents $ 116,120 $ 52,073
Short-term investments 1,687 1,096
Other Assets 13,412 13,066
Amortized cost basis of debt securities 13,143 12,542
Debt securities    
Schedule of Investments [Line Items]    
Cash and cash equivalents 0 0
Short-term investments 1,687 1,096
Other Assets 11,912 11,566
Equity investment    
Schedule of Investments [Line Items]    
Cash and cash equivalents 0 0
Short-term investments 0 0
Other Assets 1,500 1,500
Cash and money market accounts    
Schedule of Investments [Line Items]    
Cash and cash equivalents 116,120 52,073
Short-term investments 0 0
Other Assets $ 0 $ 0