| Cover | Aug. 25, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 25, 2022 |
| Current Fiscal Year End Date | --03-31 |
| Entity File Number | 001-33387 |
| Entity Registrant Name | GSI Technology, Inc. |
| Entity Central Index Key | 0001126741 |
| Entity Tax Identification Number | 77-0398779 |
| Entity Incorporation, State or Country Code | DE |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| Trading Symbol | GSIT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
