XML 141 R128.htm IDEA: XBRL DOCUMENT v3.25.4
Income Taxes - Net Operating Loss Carryforwards (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
UNITED STATES    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards $ 169.0 $ 144.5
Operating loss carryforwards, subject to expiration 9.2 9.2
Operating loss carryforwards, not subject to expiration 159.7 135.3
MASSACHUSETTS    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards $ 85.2 $ 81.2