Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 10, 2020
Document and Entity Information [Abstract]
Entity Registrant Name	Protara Therapeutics, Inc.
Entity Central Index Key	0001359931
Amendment Flag	false
Document Type	10-Q
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020
Document Period End Date	Sep. 30, 2020
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity File Number	001-36694
Entity Incorporation, State or Country Code	DE
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		11,211,840