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COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract] |  |
Lease expense | $ 23 | $ 14

X
- Definition Finance Lease, Cost + References No definition available. + Details
Name: | land_FinanceLeaseCost
Namespace Prefix: | land_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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