Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	May 31, 2022	Sep. 30, 2021
Document And Entity Information
Document Type	10-K
Document Annual Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-33387
Entity Registrant Name	GSI TECHNOLOGY INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0398779
Entity Address, Address Line One	1213 Elko Drive
Entity Address, City or Town	Sunnyvale
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94089
City Area Code	408
Local Phone Number	331-8800
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	GSIT
Security Exchange Name	NASDAQ
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	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	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		24,553,753
Entity Public Float			$ 98.7
Entity Central Index Key	0001126741
Current Fiscal Year End Date	--03-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Auditor Name	BDO USA, LLP
Auditor Firm ID	243
Auditor Location	San Jose, California
Amendment Flag	false