Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Description of Company (Details)

v3.7.0.1
Basis of Presentation and Description of Company (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Apr. 01, 2017
USD ($)
Apr. 02, 2016
USD ($)
Dec. 31, 2016
USD ($)
segment
Accounting Policies [Abstract]      
Net income $ 257 $ 990  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Reportable operating segments | segment     2
Retained earnings | Accounting Standards Update 2016-09      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative effect of new accounting principle     $ (249)
Additional paid-in capital | Accounting Standards Update 2016-09      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative effect of new accounting principle     $ 249