Percentage of shares issued and outstanding that were acquired as part of the stock repurchase program.

No definition available.

Name:	gsit_StockRepurchaseProgramPercentageOfSharesIssuedAndOutstandingAcquired
Namespace Prefix:	gsit_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Total number of shares that have been properly tendered during the period as part of the stock repurchase program.

+ References

No definition available.

+ Details

Name:	gsit_StockRepurchaseProgramSharesTenderedDuringPeriodShares
Namespace Prefix:	gsit_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

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

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

+ Details

Name:	us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

+ Details

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

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

+ Details

Name:	us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=gsit_July92014ModifiedDutchAuctionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

7- COMMON STOCK (Details 2) (USD $)	12 Months Ended			0 Months Ended
7- COMMON STOCK (Details 2) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Aug. 06, 2014	Jul. 09, 2014
Modified Dutch auction self-tender offer
Repurchase of common stock, Amount	$ 30,026,000	$ 2,880,000	$ 3,626,000
Common stock, shares outstanding	23,128,372us-gaap_CommonStockSharesOutstanding	27,561,482us-gaap_CommonStockSharesOutstanding		23,700,000us-gaap_CommonStockSharesOutstanding
July 9, 2014 Modified Dutch Auction [Member]
Modified Dutch auction self-tender offer
Stock Repurchase Program, Authorized Amount					25,000,000
Repurchase of common stock, Shares				3,846,153
Treasury stock acquired cost per share				$ 6.50
Repurchase of common stock, Amount				$ 25,000,000
Shares tendered				10,466,830
Percent of shares issued and outstanding acquired				14.0
July 9, 2014 Modified Dutch Auction [Member] \| Minimum
Modified Dutch auction self-tender offer
Share Price					$ 6.50
July 9, 2014 Modified Dutch Auction [Member] \| Maximum
Modified Dutch auction self-tender offer
Share Price					$ 6.70