8. LEASES - Operating leases (Details)		3 Months Ended
Jun. 06, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)
Leases
Operating lease, option to extend		true
Operating lease, renewal term		10 years
Proceeds from sale of assets	$ 11,300,000	$ 11,336,000
Lease term	10 years
Number of options to renew the lease term	2
Renewal lease term for sale and leaseback transaction	5 years
Amount of base rent per month	$ 90,768
Incremental rental rate percentage	3.00%
Gain from sale and leaseback transaction		5,737,000
Operating lease right-of-use assets		10,471,000	$ 1,553,000
Lease liabilities, current		1,528,000	567,000
Lease liabilities, non-current		8,815,000	955,000
Total operating lease liabilities		$ 10,343,000	$ 1,522,000
Minimum
Leases
Operating lease, term of lease		26 months
Maximum
Leases
Operating lease, term of lease		119 months

The remaining lease term of operating leases.

No definition available.

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- Definition

Amount of base rent per month under sale leaseback transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	gsit_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Incremental rental rate percentage per the sale leaseback transaction.

+ References

No definition available.

+ Details

Name:	gsit_SaleAndLeasebackTransactionRentalRateIncrementPercentage
Namespace Prefix:	gsit_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Renewal lease term for sale and leaseback transaction, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	gsit_SaleLeasebackTransactionRenewalTerm
Namespace Prefix:	gsit_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of options to renew the lease term under sale lease back transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	gsit_
Data Type:	xbrli:integerItemType
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

+ Details

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Period Type:	duration

- Definition

Indicates (true false) whether lessee has option to extend operating lease.

+ References

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- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 50
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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Lease term for sale and leaseback transaction, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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