Annual report pursuant to Section 13 and 15(d)


Cover - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Mar. 24, 2022
Jun. 30, 2021
Document Type 10-K/A    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2021    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2021    
Current Fiscal Year End Date --12-31    
Entity File Number 001-38302    
Entity Registrant Name NRX PHARMACEUTICALS, INC.    
Entity Central Index Key 0001719406    
Entity Tax Identification Number 82-2844431    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 1201 Orange Street    
Entity Address, Address Line Two Suite 600    
Entity Address, City or Town Wilmington    
Entity Address, State or Province DE    
Entity Address, Postal Zip Code 19801    
City Area Code 484    
Local Phone Number 254-6134    
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 true    
Elected Not To Use the Extended Transition Period true    
Entity Shell Company false    
Entity Public Float     $ 187.3
Entity Common Stock, Shares Outstanding   66,641,314  
ICFR Auditor Attestation Flag false    
Auditor Name KPMG LLP    
Auditor Location Short Hills, NJ    
Auditor Firm ID 185    
Common Stock [Member]      
Title of 12(b) Security Common Stock, par value $0.001 per share    
Trading Symbol NRXP    
Security Exchange Name NASDAQ    
Common Stock warrants [Member]      
Title of 12(b) Security Warrants to purchase one share of Common Stock    
Trading Symbol NRXPW    
Security Exchange Name NASDAQ