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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Taxes [Line Items] |  |  |
Liability for deferred taxes on undistributed foreign earnings | $ 0.7 |  |
State and local net operating loss carry forwards year start | 2020 |  |
State and local net operating loss carry forwards year end | 2039 |  |
Valuation reserve | $ 5.8 | $ 5.5 |
Additional income tax expense (benefit) | $ 0.2 | 1.5 | $ 1.0
Income tax positions recognized, minimum percentage | 50.00% |  |
Expense for interest and penalties | $ 0.1 | $ 0.3 | $ 0.3
State and Local Jurisdiction [Member] |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carry forward | 35.9 |  |
Overseas Jurisdictions [Member] |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carry forward | $ 10.4 |  |
State and Foreign Authorities [Member] |  |  |
Income Taxes [Line Items] |  |  |
Open tax years | 2014 2015 2016 2017 2018 2019 |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from reserves and accruals. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=117330534&loc=d3e28680-109314 + Details
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