XML 386 R164.htm IDEA: XBRL DOCUMENT v3.24.2
UNSECURED CONVERTIBLE NOTES - 2022 Notes (FY) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 11 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Nov. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 01, 2023
Debt Instrument [Line Items]            
Preferred Stock outstanding (in shares)       0    
Interest expense $ 1,100 $ 222   $ 2,170 $ 65  
Series A-2 Preferred Stock            
Debt Instrument [Line Items]            
Preferred Stock outstanding (in shares)           3,327,624
Convertible preferred stock, shares issued upon conversion (in shares)           3,377,812
Convertible Debt            
Debt Instrument [Line Items]            
Long-term debt, gross       0 18,879  
Debt discount       0 35  
2022 Unsecured Convertible Notes | Convertible Debt            
Debt Instrument [Line Items]            
Debt instrument, face amount         20,000 $ 19,130
Long-term debt, gross       19,130    
Closing financing costs         87  
Accrued interest           813
Debt discount           $ 36
Closing financing costs       36 35  
Amortization of closing financing costs       38 15  
Interest expense       552 249  
2022 Convertible Notes | Convertible Debt            
Debt Instrument [Line Items]            
Debt instrument, face amount     $ 19,100   18,900  
Long-term debt, gross       0 $ 18,879  
Accrued interest     $ 800      
Conversion price (in dollars per share)           $ 5.982
2022 Convertible Notes | Convertible Debt | Series A-2 Preferred Stock            
Debt Instrument [Line Items]            
Shares converted (in shares)     3,327,624      
Additional 2022 Convertible Note | Convertible Debt            
Debt Instrument [Line Items]            
Debt instrument, face amount       250    
Long-term debt, gross       $ 250