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CREDIT FACILITY - Interest expense and unused line of credit fees (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
CREDIT FACILITY    
Interest expense $ 1,123 $ 985
Amortization of debt issuance costs 135 126
Unused line of credit fees and other 54 37
Total interest expense $ 1,312 $ 1,148