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

No definition available.

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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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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

The amount of revenue recognized from a change in distribution agreements.

+ References

No definition available.

+ Details

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Namespace Prefix:	gsit_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 310
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68075217&loc=SL9156395-115594

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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

- Details

Name:	us-gaap_MajorCustomersAxis=gsit_MajorCustomerOneMember
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Data Type:	na
Balance Type:
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- Details

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Data Type:	na
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- Details

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Namespace Prefix:
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- Details

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1. THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	12 Months Ended
	Mar. 31, 2018 USD ($) subsidiary facility customer	Mar. 31, 2017 USD ($) customer	Mar. 31, 2016 USD ($) customer
Basis of consolidation and risks and uncertainties
Number of subsidiaries \| subsidiary	4
Number of principal operations near fault lines \| facility	2
Revenue from revised agreements \| $	$ 2,000,000
Allowance for doubtful accounts receivable write-offs \| $	$ 0	$ 0	$ 0
Accounts receivable member \| Credit Concentration Risk
Basis of consolidation and risks and uncertainties
Number of customers \| customer	4	4
Accounts receivable member \| Credit Concentration Risk \| Customer One
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	26.00%	36.00%
Accounts receivable member \| Credit Concentration Risk \| Customer Two
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	25.00%	26.00%
Accounts receivable member \| Credit Concentration Risk \| Customer Three
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	21.00%	13.00%
Accounts receivable member \| Credit Concentration Risk \| Customer Four
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	13.00%	10.00%
Net revenue \| Customer Concentration Risk
Basis of consolidation and risks and uncertainties
Number of customers \| customer	4	4	4
Net revenue \| Customer Concentration Risk \| Customer One
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	35.00%	26.00%	28.00%
Net revenue \| Customer Concentration Risk \| Customer Two
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	16.00%	20.00%	16.00%
Net revenue \| Customer Concentration Risk \| Customer Three
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	16.00%	20.00%	14.00%
Net revenue \| Customer Concentration Risk \| Customer Four
Basis of consolidation and risks and uncertainties
Percentage attributable to customers	13.00%	10.00%	13.00%