v3.24.2
CONVERTIBLE PROMISSORY NOTES, Convertible promissory notes (FY) (Details) - USD ($)
Mar. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Debt, Long-Term and Short-Term, Combined Amount [Abstract]        
Debt instrument face amount $ 98,258,000 $ 40,700,000    
Debt Issuance costs (240,000) (240,000)    
Nominal value of Convertible Promissory Notes 98,018,000 40,460,000    
Derivative liability Component (37,234,800) (37,234,800)    
Liability component at date of issue 60,783,200 3,225,200    
Interest charged 44,939,400 42,121,800    
Total Liability component 106,264,900 $ 45,347,000    
Derivative Liability, Statement of Financial Position [Extensible Enumeration]   Less: Short-term Derivative Liability Component, Derivative Liability Component Less: Short-term Derivative Liability Component, Derivative Liability Component  
Less: Short-term liability component (50,157,800) $ (41,818,800) $ (4,123,900)  
Liability component 0 3,528,200 0  
Embedded feature Component [Abstract]        
Derivative liability Component 37,234,800 37,234,800    
Change in fair value of Embedded derivative 207,084,100 (18,832,000)    
Total Derivative Liability Component 244,318,900 18,402,800 14,905,300 $ 75,355,200
Less: Short-term Derivative Liability Component 0 (17,282,500) (14,905,300)  
Derivative Liability Component 0 1,120,300 0  
Convertible Promissory Notes 1-7 [Member]        
Debt, Long-Term and Short-Term, Combined Amount [Abstract]        
Debt instrument face amount 5,340,000 5,340,000 5,340,000  
Convertible Promissory Notes 8 -12 [Member]        
Debt, Long-Term and Short-Term, Combined Amount [Abstract]        
Debt instrument face amount 17,500,000 17,500,000 17,500,000  
Convertible Promissory Notes 13 -20 [Member]        
Debt, Long-Term and Short-Term, Combined Amount [Abstract]        
Debt instrument face amount $ 17,860,000 17,860,000 15,360,000  
Convertible Promissory Note [Member]        
Debt, Long-Term and Short-Term, Combined Amount [Abstract]        
Debt instrument face amount   40,700,000 38,200,000  
Debt Issuance costs   (240,000) (240,000)  
Nominal value of Convertible Promissory Notes   40,460,000 37,960,000  
Derivative liability Component   (37,234,800) (36,528,700)  
Liability component at date of issue   3,225,200 1,431,300  
Interest charged   42,121,800 2,692,600  
Interest paid   0 0  
Total Liability component   45,347,000 4,123,900  
Less: Short-term liability component   (41,818,800) (4,123,900)  
Liability component   3,528,200 0  
Embedded feature Component [Abstract]        
Derivative liability Component   37,234,800 36,528,700  
Change in fair value of Embedded derivative   (18,832,000) (21,623,400)  
Total Derivative Liability Component   18,402,800 14,905,300  
Less: Short-term Derivative Liability Component   (17,282,500) (14,905,300)  
Derivative Liability Component   $ 1,120,300 $ 0