Annual report pursuant to Section 13 and 15(d)


Cover - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Mar. 14, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-36467    
Entity Registrant Name RESONANT INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 45-4320930    
Entity Address, Address Line One 10900 Stonelake Blvd, Suite 100, Office 02-130    
Entity Address, City or Town Austin    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 78759    
City Area Code (805)    
Local Phone Number 308-9803    
Title of 12(b) Security Common Stock, $0.001 par value    
Trading Symbol RESN    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Public Float     $ 189
Entity Common Stock, Shares Outstanding   67,186,080  
Documents Incorporated by Reference [Text Block] None    
Entity Central Index Key 0001579910    
Amendment Flag false    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY