Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2020
Nov. 04, 2020
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Trading Symbol WATT  
Entity Registrant Name Energous Corp  
Entity Central Index Key 0001575793  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   44,546,728
Title of 12(b) Security Common Stock, $0.00001 par value  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity File Number 001-36379  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 46-1318953  
Entity Address, Address Line One 3590 North First Street  
Entity Address, Address Line Two Suite 210  
Entity Address, City or Town San Jose  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 95134  
City Area Code 408  
Local Phone Number 963-0200  
Document Quarterly Report true  
Document Transition Report false