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Debt Obligations - Revolving Line of Credit (Details) - USD ($)
Nov. 06, 2019
Mar. 29, 2020
Dec. 29, 2019
Dec. 21, 2018
Dec. 20, 2018
Sep. 28, 2018
Liquidity [Line Items]            
Revolving line of credit   $ 15,000,000 $ 15,000,000      
Heritage Bank | Revolving Line of Credit            
Liquidity [Line Items]            
Line of credit aggregate commitments       $ 15,000,000 $ 9,000,000 $ 9,000,000
Minimum cash required for covenant related to credit facility       $ 3,000,000    
Line of credit facility, expiration period 1 year          
Line of credit facility, maturity date Sep. 28, 2021          
Line of credit interest rate 0.50%          
Line of credit interest rate, one 5.50%          
Revolving line of credit   $ 15,000,000 $ 15,000,000      
Interest rate   5.50% 5.50%