Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Mar. 29, 2023
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	001-38302
Entity Registrant Name	NRX Pharmaceuticals, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-2844431
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	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float	$ 34,952,532.0
Entity Common Stock, Shares Outstanding		71,557,580
Auditor Name	KPMG LLP
Auditor Firm ID	185
Auditor Location	Short Hills, NJ
Entity Central Index Key	0001719406
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	NRXP
Security Exchange Name	NASDAQ
Common stock warrant [Member]
Title of 12(b) Security	Warrants to purchase one share of Common Stock
Trading Symbol	NRXPW
Security Exchange Name	NASDAQ