XML 62 R48.htm IDEA: XBRL DOCUMENT
v3.21.2

Description of Business and Significant Accounting Policies (Narrative) (Details) | 12 Months Ended
--- | ---
Aug. 31, 2021 USD ($) Segment Derivativecontract | Aug. 31, 2020 USD ($) | Aug. 31, 2019 USD ($)
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Number of reportable segments | Segment | 2 |  |
Percentage of marketable securities investments mature within one year | 51.00% |  |
Percentage of marketable securities investments mature within one to two years | 49.00% |  |
Allowance for doubtful accounts | $ 3,400,000 | $ 2,800,000 |
Impairments | $ 0 | $ 0 | $ 0
Number of open derivative contracts | Derivativecontract | 0 |  |
Building [Member] | Minimum [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 15 years |  |
Building [Member] | Maximum [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 40 years |  |
Equipment [Member] | Minimum [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 3 years |  |
Equipment [Member] | Maximum [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 7 years |  |
Leased Barrier Transfer Machines [Member] | Minimum [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 8 years |  |
Leased Barrier Transfer Machines [Member] | Maximum [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 10 years |  |
Computer Hardware and Software [Member] | Minimum [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 3 years |  |
Computer Hardware and Software [Member] | Maximum [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 5 years |  |
Leased Barriers [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 12 years |  |
Other [Member] | Minimum [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 2 years |  |
Other [Member] | Maximum [Member] |  |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |  |
Useful life | 20 years |  |

X
- Definition Description Of Business And Significant Accounting Policies [Line Items] + References No definition available. + Details
Name: | lnn_DescriptionOfBusinessAndSignificantAccountingPoliciesLineItems
Namespace Prefix: | lnn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of open derivative contracts. + References No definition available. + Details
Name: | lnn_NumberOfOpenDerivativeContracts
Namespace Prefix: | lnn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of marketable securities investments mature with in one to two years. + References No definition available. + Details
Name: | lnn_PercentageOfMarketableSecuritiesInvestmentsMatureWithInOneToTwoYears
Namespace Prefix: | lnn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of marketable securities investments mature within one year. + References No definition available. + Details
Name: | lnn_PercentageOfMarketableSecuritiesInvestmentsMatureWithinOneYear
Namespace Prefix: | lnn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2420-110228 + Details
Name: | us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_EquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=lnn_LeasedBarrierTransferMachinesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=lnn_ComputerHardwareAndSoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=lnn_LeasedBarriersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |