Cover page - shares	9 Months Ended
	Sep. 30, 2021	Oct. 31, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-40797
Entity Registrant Name	PROCEPT BioRobotics Corporation
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-0199180
Entity Address, Address Line One	900 Island Drive
Entity Address, City or Town	Redwood City
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94065
City Area Code	650
Local Phone Number	232-7200
Title of 12(b) Security	Common stock, $0.00001 par value per share
Trading Symbol	PRCT
Security Exchange Name	NASDAQ
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		43,496,831
Entity Central Index Key	0001588978
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Amendment Flag	false
Document Fiscal Period Focus	Q3