Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Major Vendor (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Major Vendor (Details) - Supplier Concentration Risk
3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Research and development expenditures | Vendor One      
Concentration      
Concentration Risk (as a percent) 24.00% 2.00%  
Research and development expenditures | Vendor Two      
Concentration      
Concentration Risk (as a percent) 13.00% 60.00%  
Accounts payable and accrued expense | Vendor Two      
Concentration      
Concentration Risk (as a percent) 54.00%   53.00%