Quarterly report pursuant to Section 13 or 15(d)

Defined Contribution Plan - Additional Information (Details)

v3.19.3
Defined Contribution Plan - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 28, 2019
Sep. 29, 2018
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]        
Employer contributions to employee compensation plan $ 3 $ 10 $ 20 $ 33
Maximum        
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]        
Defined contribution plan, employer matching contribution, percent     5.00%