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Income Taxes - Reconciliations Between Statutory Federal Income Tax Rate and Effective Rate (Detail)			12 Months Ended
	Dec. 22, 2017	Dec. 21, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Statutory Federal income tax rate	21.00%	35.00%	21.00%	21.00%	34.00%
Increase (decrease) resulting from:
Change in Valuation Allowance			30.70%	(6.60%)	10.60%
Effect of different tax rates of foreign jurisdictions			(24.80%)	(6.60%)	(20.80%)
US Tax Reform Items			4.30%	10.80%	29.10%
Research and Development Credits			(2.30%)	(2.50%)	(4.60%)
Non-deductible expenses			2.10%	3.40%	2.40%
Foreign, state and local tax, net of Federal benefit			1.70%	1.80%	0.80%
Tax effects of intercompany transfers			1.50%	0.80%	(5.00%)
Undistributed profit of subsidiaries			1.20%	1.20%	5.80%
Other			1.20%	4.60%	(1.00%)
Stock Compensation Expense			0.00%	0.00%	(2.20%)
Effective Rate			36.60%	27.90%	49.10%

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