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

SHAREHOLDERS' DEFICIT - Stock Options Outstanding and Exercisable (Details)

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SHAREHOLDERS' DEFICIT - Stock Options Outstanding and Exercisable (Details) - Stock options - $ / shares
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
SHAREHOLDERS' EQUITY (DEFICIT)        
Options Outstanding (in shares) 21,055 36,425 49,040 60,212
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 exercise price of options outstanding (in dollars per share) $ 121.65 $ 93.55 $ 129.60 $ 111.20
Number Exercisable (in shares) 20,265 26,972    
Weighted average exercise price of options exercisable (in dollars per share) $ 121.81 $ 113.40    
$156.00 Exercise Price Per Share        
SHAREHOLDERS' EQUITY (DEFICIT)        
Options Outstanding (in shares)   5,370    
Weighted Average Remaining Contractual Life (in years)   1 month 6 days    
Weighted average exercise price of options outstanding (in dollars per share)   $ 156.00    
Number Exercisable (in shares)   5,370    
Weighted average exercise price of options exercisable (in dollars per share)   $ 156.00    
$128.00 Exercise Price Per Share        
SHAREHOLDERS' EQUITY (DEFICIT)        
Options Outstanding (in shares) 2,475 2,475    
Weighted Average Remaining Contractual Life (in years) 6 months 9 months 18 days    
Weighted average exercise price of options outstanding (in dollars per share) $ 128.00 $ 128.00    
Number Exercisable (in shares) 2,475 2,475    
Weighted average exercise price of options exercisable (in dollars per share) $ 128.00 $ 128.00    
$106.00 Exercise Price Per Share        
SHAREHOLDERS' EQUITY (DEFICIT)        
Options Outstanding (in shares) 9,830 9,830    
Weighted Average Remaining Contractual Life (in years) 1 year 9 months 18 days 2 years 1 month 6 days    
Weighted average exercise price of options outstanding (in dollars per share) $ 106.00 $ 106.00    
Number Exercisable (in shares) 9,830 8,874    
Weighted average exercise price of options exercisable (in dollars per share) $ 106.00 $ 106.00    
$112.00 Exercise Price Per Share        
SHAREHOLDERS' EQUITY (DEFICIT)        
Options Outstanding (in shares) 1,500 1,500    
Weighted Average Remaining Contractual Life (in years) 2 years 2 years 3 months 18 days    
Weighted average exercise price of options outstanding (in dollars per share) $ 112.00 $ 112.00    
Number Exercisable (in shares) 1,300 1,300    
Weighted average exercise price of options exercisable (in dollars per share) $ 112.00 $ 112.00    
$153.00 Exercise Price Per Share        
SHAREHOLDERS' EQUITY (DEFICIT)        
Options Outstanding (in shares) 5,750 5,750    
Weighted Average Remaining Contractual Life (in years) 2 years 6 months 2 years 9 months 18 days    
Weighted average exercise price of options outstanding (in dollars per share) $ 153.00 $ 153.00    
Number Exercisable (in shares) 5,560 4,719    
Weighted average exercise price of options exercisable (in dollars per share) $ 153.00 $ 153.00    
$103.20 Exercise Price Per Share        
SHAREHOLDERS' EQUITY (DEFICIT)        
Options Outstanding (in shares) 1,500 1,500    
Weighted Average Remaining Contractual Life (in years) 2 years 10 months 24 days 3 years 2 months 12 days    
Weighted average exercise price of options outstanding (in dollars per share) $ 103.20 $ 103.20    
Number Exercisable (in shares) 1,100 900    
Weighted average exercise price of options exercisable (in dollars per share) $ 103.20 $ 103.20    
$0.86 Exercise Price Per Share        
SHAREHOLDERS' EQUITY (DEFICIT)        
Options Outstanding (in shares)   10,000    
Weighted Average Remaining Contractual Life (in years)   4 years 6 months    
Weighted average exercise price of options outstanding (in dollars per share)   $ 0.86    
Number Exercisable (in shares)   3,334    
Weighted average exercise price of options exercisable (in dollars per share)   $ 0.86    
$93.55 Exercise Price Per Share        
SHAREHOLDERS' EQUITY (DEFICIT)        
Options Outstanding (in shares)   36,425    
Weighted Average Remaining Contractual Life (in years)   2 years 6 months    
Weighted average exercise price of options outstanding (in dollars per share)   $ 93.55    
Number Exercisable (in shares)   26,972    
Weighted average exercise price of options exercisable (in dollars per share)   $ 113.40    
$121.81 Exercise Price Per Share        
SHAREHOLDERS' EQUITY (DEFICIT)        
Options Outstanding (in shares) 21,055      
Weighted Average Remaining Contractual Life (in years) 2 years      
Weighted average exercise price of options outstanding (in dollars per share) $ 121.65      
Number Exercisable (in shares) 20,265      
Weighted average exercise price of options exercisable (in dollars per share) $ 121.81