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Subsequent Events - Additional Information (Detail) - USD ($) | 1 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 25, 2017 | Sep. 30, 2017 | Sep. 30, 2016
Subsequent Event [Line Items] |  |  |
Proceeds from sale of business |  | $ 2,300,000 | $ 349,373,000
Industrial Acquisitions LLC and Industrial Products LLC [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Proceeds from sale of business |  | $ 2,300,000 |
Industrial Acquisitions LLC and Industrial Products LLC [Member] | Subsequent Event [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Proceeds from sale of business | $ 3,500,000 |  |
Loss on sales of businesses | $ 800,000 |  |

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- Definition Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=lxu_IndustrialAcquisitionsLLCAndIndustrialProductsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |