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Loan and Security Agreement - Additional Information (Details) - Loan Agreement - Silicon Valley Bank - Revolving Loan Facility - USD ($)
Nov. 02, 2016
Dec. 29, 2018
Dec. 30, 2017
Line Of Credit Facility [Line Items]      
Borrowings available under secured revolving loan facility $ 15,000,000    
Loan facility, maturity date Nov. 02, 2019    
Secured revolving loan facility outstanding   $ 0 $ 0
Wall Street Journal Prime Rate      
Line Of Credit Facility [Line Items]      
Debt instrument, basis spread on variable interest rate 1.50%