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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Income Tax Contingency [Line Items] |  |
Deferred tax assets, state NOLs | $ 1.2 |
Deferred tax assets, federal NOLs | 0.8 |
Liability for unrecognized tax benefits | 6.1 |
Threshold to favorably impact effective tax rate | 6.2 |
Unrecognized tax benefits, accrued interest | 0.2 | $ 0.1
UNITED KINGDOM |  |
Income Tax Contingency [Line Items] |  |
Deferred tax assets, foreign NOLs | 8.0 |
CANADA |  |
Income Tax Contingency [Line Items] |  |
Deferred tax assets, foreign NOLs | 1.2 |
GERMANY |  |
Income Tax Contingency [Line Items] |  |
Deferred tax assets, foreign NOLs | 1.4 |
Federal |  |
Income Tax Contingency [Line Items] |  |
Federal research and development credit carry forwards | 0.1 |
State |  |
Income Tax Contingency [Line Items] |  |
Liability for unrecognized tax benefits | 0.1 |
State | ARIZONA |  |
Income Tax Contingency [Line Items] |  |
State research and development credit carry forwards | $ 9.2 |

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