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Income Taxes - Summary of Differences Between U.S. Federal Statutory Tax Rate and Company's Consolidated Effective Tax Rate (Detail)	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate	21.00%	21.00%
State income taxes (net of federal benefit)	(10.80%)	2.90%
Cessation of operations	0.00%	(7.00%)
Research and development credit	2.30%	(1.60%)
Tax windfall on share-based awards	0.00%	(68.50%)
GILTI	(6.30%)	0.00%
FDII	4.80%	0.00%
Section 162(m) limitation	(1.40%)	1.00%
Increase in valuation allowance due to net operating loss	(2.20%)	1.60%
Impact of foreign operations	3.90%	1.00%
Other	9.80%	1.90%
Total effective tax rate	21.10%	(47.70%)

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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