Energous Corporation Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Estimated Fair Value of the Warrant Liability (Detail) - Warrants Two Thousand Twenty Three - Level 3 [Member]	Sep. 30, 2023 shares	Jun. 30, 2023 shares	Mar. 31, 2023 shares
Share Price [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants and rights outstanding measurement input	1.6	4.8	10.8
Exercise Price [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants and rights outstanding measurement input	1.66	8	8
Term [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants and rights outstanding measurement input term	5 years 6 months	5 years 8 months 12 days	6 years
Volatility [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants and rights outstanding measurement input	0.75	0.65	0.65
Risk-Free Rate [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants and rights outstanding measurement input	0.046	0.041	0.036
Dividend Yield [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Warrants and rights outstanding measurement input	0	0	0