Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Nov. 04, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Entity Registrant Name	PERASO INC.
Entity Central Index Key	0000890394
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Trading Symbol	PRSO
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Address, State or Province	CA
Entity Shell Company	false
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, par value $0.001 per share
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		12,768,987
Entity File Number	000-32929
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0291941
Entity Address, Address Line One	2309 Bering Drive
Entity Address, City or Town	San Jose
Entity Address, Postal Zip Code	95131
City Area Code	408
Local Phone Number	418-7500
Document Quarterly Report	true
Document Transition Report	false