XML 60 R49.htm IDEA: XBRL DOCUMENT
v3.21.2

Schedule of Earnings Per Share, Basic and Diluted (Details) (Parenthetical) | 12 Months Ended
--- | ---
Dec. 31, 2020
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