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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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