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9. COMMITMENTS AND CONTINGENCIES - Product warranties (Details) - USD ($)	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
COMMITMENTS AND CONTINGENCIES
Royalty expense	$ 0	$ 36,000	$ 39,000
Product warranties
Warranty period	3 years

X

- Definition

Represents the period for which the entity warranties its products.

+ References

No definition available.

+ Details

Name:	gsit_WarrantyPeriod
Namespace Prefix:	gsit_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

+ Details

Name:	us-gaap_RoyaltyExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_StandardProductWarrantyDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration