Quarterly report pursuant to Section 13 or 15(d)

MEZZANINE EQUITY - Narrative (Details)

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MEZZANINE EQUITY - Narrative (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2021
$ / shares
shares
Sep. 30, 2023
shares
Jun. 30, 2023
shares
Dec. 31, 2023
shareholder
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Mar. 31, 2024
shareholder
$ / shares
Rate
shares
Temporary Equity [Line Items]            
Number of unaffiliated investors | shareholder       3   3
Warrants to purchase common stock (in shares)           42,089,476
Exercise price of warrants (in dollars per share) | $ / shares $ 1.087         $ 0.68
Series B Convertible Preferred Stock            
Temporary Equity [Line Items]            
Share price (in dollars per share) | $ / shares         $ 3.00  
Term of option to convert (in years)         6 years  
Conversion price of preferred stock (in dollars per share) | $ / shares         $ 3.00  
Threshold VWAP, in excess of (in dollars per share) | $ / shares         $ 4.00  
Number of consecutive trading days         20 days  
Convertible preferred stock, outstanding (in shares)       4,908,333 4,908,333 4,908,333
Number of consecutive trading dates after anniversary         60 days  
VWAP threshold, less than or equal to (in dollars per share) | $ / shares         $ 0.50  
Conversion ratio (in shares)         1  
Value of shares converted | $         $ 14,725  
VWAP threshold, greater than (in dollars per share) | $ / shares         $ 0.50  
Convertible preferred stock, issued (in shares)       4,908,333   4,908,333
Series C Convertible Preferred Stock            
Temporary Equity [Line Items]            
Number of shares converted (in shares)   784,334 4,276,608 5,060,942    
Convertible preferred stock, outstanding (in shares)       1,155,274   1,155,274
Conversion ratio (in shares) | Rate           500.00%
Convertible preferred stock, issued (in shares)       1,155,274   1,155,274
Series C Convertible Preferred Stock | Hadron Healthcare            
Temporary Equity [Line Items]            
Shares issued (in shares) 6,216,216          
Common stock            
Temporary Equity [Line Items]            
Number of shares converted (in shares)       25,304,710    
Shares issued on conversion of preferred stock (per share) 5 3,921,670 21,383,040      
Common stock | Maximum            
Temporary Equity [Line Items]            
Warrants to purchase common stock (in shares) 15,540,540          
Two Unaffiliated Institutional Shareholders | Series B Convertible Preferred Stock | Exchange Agreement            
Temporary Equity [Line Items]            
Number of shares converted (in shares)         4,908,333