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v3.21.1

Other Receivables and Prepayments, Net (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Other Receivables And Prepayments Net [Abstract] |  |  |
Bad debt expense | $ 26,688 |  |
Recovery of bad debt | $ 17,913 |  |
Bad debts on other receivables |  | $ 499 | $ 16,403

X
- Definition Bad debt expense. + References No definition available. + Details
Name: | llit_BadDebtExpense
Namespace Prefix: | llit_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Bad debts on other receivables. + References No definition available. + Details
Name: | llit_BadDebtsOnOtherReceivables
Namespace Prefix: | llit_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | llit_OtherReceivablesAndPrepaymentsNetAbstract
Namespace Prefix: | llit_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Recovery of bad debt. + References No definition available. + Details
Name: | llit_RecoveryOfBadDebt
Namespace Prefix: | llit_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration