v3.23.1

COVER - USD ($) $ in Millions	12 Months Ended
COVER - USD ($) $ in Millions	Dec. 31, 2022	Mar. 18, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-37797
Entity Registrant Name	9 METERS BIOPHARMA, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-3948465
Entity Address, Address Line One	4509 Creedmoor Road
Entity Address, Address Line Two	Suite 600
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27612
City Area Code	919
Local Phone Number	275-1933
Title of 12(b) Security	Common Stock $0.0001 Par Value
Trading Symbol	NMTR
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			$ 67.2
Entity Common Stock, Shares Outstanding (in shares)		14,336,356
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Central Index Key	0001551986
Auditor Firm ID	199
Auditor Name	Mayer Hoffman McCann P.C.
Auditor Location	San Diego, California

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9 METERS BIOPHARMA, INC. 10-K/A