Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies and Nature of Operations - Aggregate Warranty Liabilities (Details)

v3.8.0.1
Summary of Significant Accounting Policies and Nature of Operations - Aggregate Warranty Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Warranty liabilities, beginning of period $ 889 $ 110
Additions to warranty liabilities 963 918
Reductions to warranty liabilities (442) (139)
Warranty liabilities, end of period $ 1,410 $ 889