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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) Facility
Summary Of Significant Accounting Policies [Line Items] |  |
Number of facilities for manufacture and distribution of products | Facility |  | 4
Tax benefit recognized |  | greater than 50%
El Dorado Chemical Company [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Litigation settlement received from other party |  | $ 4.3
Litigation settlement, services and parts awarded from other party |  | 2.8
Litigation settlement, expense paid |  | 2.7
Settle of invoices held in account payable | $ 3.2 | $ 3.2
El Dorado Chemical Company [Member] | Property, Plant and Equipment [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Recovery from litigation settlement | 1.9 |
Cost of Sales [Member] | El Dorado Chemical Company [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Recovery from litigation settlement | $ 5.7 |

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- Definition Amount of loss contingency liability expected to be resolved within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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- Definition Cash received for the settlement of litigation during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585 + Details
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