Long-Term Debt and Line of Credit (Details) (USD $)
12 Months Ended
Dec. 27, 2014
Dec. 28, 2013
Dec. 29, 2012
Long-term debt and line of credit      
Long-term debt $ 66,259,000 $ 67,975,000  
Less current portion of long-term debt (7,041,000) (6,110,000)  
Long-term debt, less current portion 59,218,000 61,865,000  
Basis points added to base rate (as a percent) 1.65%    
Annual maturities of capital lease obligations      
2015 562,000    
2016 542,000    
2017 448,000    
Subtotal 1,552,000    
Less: Amount representing interest (91,000)    
Total 1,461,000    
Annual maturities of debt      
2015 6,532,000    
2016 9,109,000    
2017 9,163,000    
2018 38,961,000    
2019 870,000    
Thereafter 163,000    
Total 64,798,000    
Outstanding credit facility 18,802,000 3,223,000  
Net interest expense      
Interest expense (2,604,000) (872,000) (764,000)
Interest expense, net (2,604,000) (872,000) (764,000)
Interest Rate Cash Flow Hedges      
Fair value of interest rate swap 349,000 526,000  
Bluffton, IN mortgage loan due monthly through December 2016      
Long-term debt and line of credit      
Long-term debt 1,825,000 1,916,000  
Variable rate basis 30 day LIBOR    
Bluffton, IN mortgage loan due monthly through December 2016 | Cash Flow Hedging [Member]      
Interest Rate Cash Flow Hedges      
Fixed interest rate through swap agreement (as a percent) 6.85%    
Notional value of interest rate swap 1,800,000 1,900,000  
Fair value of interest rate swap 155,000 240,000  
Equipment Term Loan B Due Monthly Through September 2020 [Member]      
Long-term debt and line of credit      
Long-term debt 1,278,000 1,481,000  
Interest Rate Cash Flow Hedges      
Stated interest rate (as a percent) 3.12%    
Equipment Term Loan For Rader Farms Facilities Due Monthly Through August 2019 Member      
Long-term debt and line of credit      
Long-term debt 2,428,000    
Equipment Term Loan For Willamette Valley Due Monthly Through August 2019 Member      
Long-term debt and line of credit      
Long-term debt 1,802,000    
Lynden, WA real estate term loan due monthly through July 2017      
Long-term debt and line of credit      
Long-term debt 2,565,000 2,805,000  
Variable rate basis LIBOR    
Basis points added to base rate (as a percent) 1.65%    
Lynden, WA real estate term loan due monthly through July 2017 | Cash Flow Hedging [Member]      
Interest Rate Cash Flow Hedges      
Fixed interest rate through swap agreement (as a percent) 4.28%    
Notional value of interest rate swap 2,600,000 2,800,000  
Fair value of interest rate swap 194,000 286,000  
Capital lease obligations, primarily due September 2017      
Long-term debt and line of credit      
Long-term debt 1,461,000 1,773,000  
Revolving Credit Facility [Member]      
Long-term debt and line of credit      
Variable rate basis Prime rate or LIBOR plus LIBOR Rate Margin    
Annual maturities of debt      
Maximum borrowing capacity 30,000,000    
Adjusted maximum borrowing capacity due to the permitted leverage ratio 18,800,000    
Outstanding credit facility 11,200,000    
Revolving Credit Facility [Member] | Fresh Frozen Foods      
Annual maturities of debt      
Maximum borrowing capacity 30,000,000    
Senior Secured Term Loan due Quarterly through November 2018 [Member]      
Long-term debt and line of credit      
Long-term debt 54,900,000 60,000,000  
Senior Secured Term Loan due Quarterly through November 2018 [Member] | Fresh Frozen Foods      
Annual maturities of debt      
Maximum borrowing capacity $ 60,000,000