The number of customers that are reflected in the stated concentration of risk.

No definition available.

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

Represents about concentration risk threshold percentage.

+ References

No definition available.

+ Details

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- Definition

The number of principal operations of the entity that are located near geologic fault lines.

+ References

No definition available.

+ Details

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Namespace Prefix:	gsit_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of subsidiaries owned by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	gsit_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

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

- Definition

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportingUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=gsit_MajorCustomerOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=gsit_MajorCustomerTwoMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

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1. THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2026 USD ($) customer facility subsidiary item	Mar. 31, 2025 USD ($) customer	Mar. 31, 2024 USD ($) customer
Basis of consolidation and risks and uncertainties
Number of subsidiaries \| subsidiary	4
Number of principal operations near fault lines \| facility	2
Allowance for doubtful accounts receivable write offs \| $	$ 0	$ 0	$ 0
Number of reporting units \| item	1
Accounts Receivable
Basis of consolidation and risks and uncertainties
Number of customers	2	2
Accounts Receivable \| Customer Concentration Risk \| Major Customer One
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	52.00%	56.00%
Accounts Receivable \| Customer Concentration Risk \| Major Customer Two
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	34.00%	29.00%
Sales Revenue, Net
Basis of consolidation and risks and uncertainties
Number of customers	2	2	2
Sales Revenue, Net \| Customer Concentration Risk \| Major Customer One
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	64.00%	50.00%	51.00%
Sales Revenue, Net \| Customer Concentration Risk \| Major Customer Two
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	14.00%	23.00%	14.00%