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Loans Receivable - Additional Information (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Loans and Leases Receivable Disclosure [Abstract] |  |
Loans and extensions of credit | $ 10,271 | $ 10,631

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- Definition Loans and leases receivable and extensions of credit. + References No definition available. + Details
Name: | lnkb_LoansAndLeasesReceivableAndExtensionsOfCredit
Namespace Prefix: | lnkb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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