XML 61 R50.htm IDEA: XBRL DOCUMENT v3.22.2.2

Schedule of Earnings Per Share, Basic and Diluted (Details) (Parenthetical)	12 Months Ended
	Dec. 31, 2021
Earnings per share:
Stock dividend, percentage	5.00%

X

- Definition

Stock dividend, percentage.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_EarningsPerShareAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration