Annual report pursuant to Section 13 and 15(d)

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

v3.19.1
Summary of Significant Accounting Policies and Nature of Operations - Aggregate Warranty Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Warranty liabilities, beginning of period $ 1,410 $ 889
Additions to warranty liabilities 597 963
Reductions to warranty liabilities (587) (442)
Warranty liabilities, end of period $ 1,420 $ 1,410