XML 16 R5.htm IDEA: XBRL DOCUMENT
v3.21.2

Consolidated Statements of Earnings (Unaudited) (Parenthetical) | 12 Months Ended
--- | ---
Dec. 31, 2020
Consolidated Statements Of Earnings Unaudited |
Percentage of stocks dividend | 5.00%

X
- Definition The percentage rate used to calculate stock dividend payments. + 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