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STOCKHOLDERS' DEFICIT - At-The-Market Share Issuances (Details) - Common Stock - At-the-Market Offerings - USD ($)
shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
STOCKHOLDERS' EQUITY    
Shares issued through at-the-market offering 55.2 17.1
At-the-market offering gross proceeds $ 64.7 $ 63.0
Sales agent fees paid 1.3 0.6
Other third-party issuance costs incurred $ 0.6 0.3
Other third-party issuance costs paid   $ 1.5