Quarterly report pursuant to Section 13 or 15(d)

Interim Consolidated Financial Statement Details - Consolidated Balance Sheets (Parenthetical) (Details)

v3.20.2
Interim Consolidated Financial Statement Details - Consolidated Balance Sheets (Parenthetical) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Jun. 28, 2020
Mar. 29, 2020
Jun. 30, 2019
Dec. 29, 2019
Condensed Balance Sheet Statements Captions [Line Items]            
Depreciation of property, plant and equipment     $ 3,222   $ 3,253  
Dongguan Facility Closure [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Restructuring Charges, Total           $ 5,000
Machinery and Equipment [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Capital Leased Assets, Gross, Total $ 2,275   2,275     2,275
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation 1,196   1,196     974
Machinery and Equipment [Member] | Dongguan Facility Closure [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Property, Plant and Equipment, Transfers and Changes     636      
Accumulated Depreciation, Depletion and Amortization, Write Down     636      
Machinery and Equipment [Member] | Assets Under Finance Lease [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Depreciation of property, plant and equipment 109 $ 142   $ 222 284  
Building and Building Improvements [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Capital Leased Assets, Gross, Total 9,082   9,082     9,082
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation 1,303   1,303     900
Building and Building Improvements [Member] | Assets Under Finance Lease [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Depreciation of property, plant and equipment 201 201 403   402  
Furniture and Fixtures [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Capital Leased Assets, Gross, Total 307   307     307
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation 85   85     52
Furniture and Fixtures [Member] | Dongguan Facility Closure [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Property, Plant and Equipment, Transfers and Changes     209      
Accumulated Depreciation, Depletion and Amortization, Write Down     209      
Furniture and Fixtures [Member] | Assets Under Finance Lease [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Depreciation of property, plant and equipment 16 10 33   20  
Computer Equipment [Member] | Dongguan Facility Closure [Member] | Restructuring Charges Related to Write Down of Property, Plant and Equipment [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Property, Plant and Equipment, Transfers and Changes     414      
Accumulated Depreciation, Depletion and Amortization, Write Down     414      
Computer Equipment [Member] | Assets Under Finance Lease [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Capital Leased Assets, Gross, Total 91   91     91
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation 66   66     $ 51
Depreciation of property, plant and equipment $ 8 $ 8 15   $ 15  
Leasehold Improvements [Member] | Dongguan Facility Closure [Member]            
Condensed Balance Sheet Statements Captions [Line Items]            
Property, Plant and Equipment, Transfers and Changes     185      
Accumulated Depreciation, Depletion and Amortization, Write Down     182      
Restructuring Charges, Total     $ 3