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Property, Equipment and Leasehold Improvements (Detail) - USD ($)
$ in Thousands
Jan. 01, 2021
Jan. 03, 2020
Property:    
Land $ 18,339 $ 18,339
Buildings 62,324 60,437
Construction in progress 650 1,133
Equipment:    
Machinery and equipment 48,728 47,628
Office furniture and equipment 10,500 10,504
Leasehold improvements 13,201 13,653
Property, Plant and Equipment, Gross, Total 153,742 151,694
Less accumulated depreciation and amortization 93,919 90,107
Property, equipment and leasehold improvements, net $ 59,823 $ 61,587