General form of registration statement for all companies including face-amount certificate companies

DEBT - Accretion and Interest Expense, Excluding Debt Issuance Cost Amortization (Details)

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DEBT - Accretion and Interest Expense, Excluding Debt Issuance Cost Amortization (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Debt        
Accretion expense $ 102 $ 170 $ 681 $ 681
Debt issuance cost amortization 40 39 159 161
Interest paid 668 550 1,499 1,451
Convertible Debt        
Debt        
Accretion expense 27 95 381 381
Interest paid   174 221 221
Centurion debenture        
Debt        
Accretion expense 75 75 300 300
Debt issuance cost amortization 40 39 159 161
Interest paid $ 668 $ 376 $ 1,278 $ 1,230