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v3.20.1

Summary of Significant Accounting Policies (Details 2) | 12 Months Ended
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Dec. 31, 2019
Software copyrights [Member] |
Property, Plant and Equipment [Line Items] |
Intangible assets estimated useful lives | 20 years
Patent rights [Member] |
Property, Plant and Equipment [Line Items] |
Intangible assets estimated useful lives | 10 years
Other Software [Member] |
Property, Plant and Equipment [Line Items] |
Intangible assets estimated useful lives | 5 years

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=llit_OtherSoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |