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Consolidated Statements of Earnings (Unaudited) (Parenthetical)	12 Months Ended
	Dec. 31, 2023
Consolidated Statements Of Earnings Unaudited
Percentage of stocks dividend	5.00%

X

- Definition

Percentage of stocks dividend.

+ References

No definition available.

+ Details

Name:	LARK_PercentageOfStocksDividend
Namespace Prefix:	LARK_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	LARK_StatementConsolidatedStatementsOfEarningsUnauditedParentheticalAbstract
Namespace Prefix:	LARK_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration