Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 13, 2020	Jun. 28, 2019
Cover page.
Entity Incorporation, State or Country Code	DE
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Entity File Number	001-15169
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2019
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	PERFICIENT, INC.
Entity Central Index Key	0001085869
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	PRFT
Security Exchange Name	NASDAQ
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	Yes
Entity Interactive Data Current	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1,098,742,358
Entity Common Stock, Shares Outstanding		32,891,785
Entity Address, Address Line One	555 Maryville University Drive
Entity Address, Address Line Two	Suite 600
Entity Address, City or Town	Saint Louis
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63141
City Area Code	314
Local Phone Number	529-3600
Entity Tax Identification Number	74-2853258