Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 27, 2019	Dec. 28, 2018
Accrued Liabilities And Other Liabilities Current [Abstract]
Accrued compensation and benefits	$ 9,392	$ 5,012
Accrued bonuses	2,063	5,064
Accrued dividend payable		5,407
Acquisition earnout accruals	1,112	2,559
Contract liabilities	9,827	8,259
Accrued sales, use, franchise and VAT tax	2,956	3,077
Non-cash stock compensation accrual	689	872
Income tax payable	3,591	1,769
Other accrued expenses	1,820	2,479
Total accrued expenses and other liabilities	$ 31,450	$ 34,498