Fair Value Measurement - Schedule of Assumptions Used to Determine Fair Value of Warrants (Details)	Sep. 30, 2025 $ / shares	Dec. 31, 2024 $ / shares
Time to expiration \| April 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Time to expiration	3 years 14 days	3 years 9 months 14 days
Time to expiration \| May 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Time to expiration	2 years 9 months 14 days	3 years 6 months 14 days
Time to expiration \| December 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Time to expiration	3 years 2 months 15 days	3 years 11 months 15 days
Common stock price \| April 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Warrants and rights outstanding, measurement input (per unit)	11.39	4.86
Common stock price \| May 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Warrants and rights outstanding, measurement input (per unit)	11.39	4.86
Common stock price \| December 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Warrants and rights outstanding, measurement input (per unit)	11.39	4.86
Risk-free interest rate \| April 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Warrants and rights outstanding, measurement input (per unit)	0.036	0.043
Risk-free interest rate \| May 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Warrants and rights outstanding, measurement input (per unit)	0.036	0.043
Risk-free interest rate \| December 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Warrants and rights outstanding, measurement input (per unit)	0.036	0.043
Volatility \| April 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Warrants and rights outstanding, measurement input (per unit)	1.000	0.900
Volatility \| May 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Warrants and rights outstanding, measurement input (per unit)	1.000	0.900
Volatility \| December 2023 warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Warrants and rights outstanding, measurement input (per unit)	1.000	0.900

Eos Energy Enterprises, Inc. 10-Q