Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

v3.6.0.2
Income Taxes (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Dec. 27, 2014
Dec. 28, 2013
Income Tax Disclosure [Line Items]        
Cumulative earnings of foreign subsidiaries $ 77,000      
Unrecognized tax benefit $ 3,501 $ 2,049 $ 1,156 $ 1,122
Federal returns currently under examination The Company’s federal returns are currently under examination by the Internal Revenue Service (IRS) in the United States for the periods 2007 through 2012      
Parent Company [Member]        
Income Tax Disclosure [Line Items]        
Third Party Export Sales $ 62,661 $ 58,207 $ 60,052