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Schedule of Gains from Changes in Fair Value of Derivative Financial Instruments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Fair Value Disclosures [Abstract] |  |  |  |
Total change in fair value | $ (101) | $ 70 | $ 18 | $ 215

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- Definition Gains loss from changes in fair value of derivative financial instruments. + References No definition available. + Details
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Namespace Prefix: | LARK_
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Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration