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

SHAREHOLDERS' (DEFICIT) EQUITY - Stock Options (Details)

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SHAREHOLDERS' (DEFICIT) EQUITY - Stock Options (Details) - Stock options - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Options at beginning of period (in shares) 36,425 49,040 60,212  
Options granted (in shares)   10,000 6,500  
Options exercised (in shares)     (40)  
Options canceled / expired (in shares)   (22,615) (17,632)  
Options at end of period (in shares) 21,055 36,425 49,040 60,212
Options vested and exercisable as at end of the period 20,265 26,972    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]        
Exercise Price at beginning of period (in dollars per share) $ 93.55 $ 129.60 $ 111.20  
Options granted (in dollars per share)   0.86 103.20  
Options exercised (in dollars per share)     100.80  
Options canceled / expired (in dollars per share)   130.82 50.20  
Exercise Price at end of period (in dollars per share) 121.65 93.55 $ 129.60 $ 111.20
Exercise Price vested and exercisable (in dollars per share) $ 121.81 $ 113.40    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]        
Weighted Average Remaining Contractual Life (in years) 2 years 3 years 6 months 2 years 9 months 18 days 3 years 7 months 6 days
Weighted Average Remaining life vested and exercisable (in years) 1 year 10 months 24 days 2 years