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NATURE OF OPERATIONS - Future minimum lease income (Details)
$ in Thousands
Mar. 31, 2021
USD ($)
Operating Leases, Future Minimum Payments Receivable [Abstract]  
2021 $ 1,196
2022 1,612
2023 1,612
2024 1,612
2025 1,612
Thereafter 4,618
Total $ 12,262