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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