XML 71 R59.htm IDEA: XBRL DOCUMENT
v3.7.0.1

9. STOCK- BASED COMPENSATION (Details) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 shares | Mar. 31, 2017 USD ($) item shares | Mar. 31, 2016 shares | Mar. 31, 2015 shares | Mar. 31, 2007 shares
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Granted (in shares) |  | 1,362,798 | 969,913 | 791,903 |
2007 Equity Incentive Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Maximum shares authorized |  |  |  |  | 3,000,000
Maximum annual plan shares authorized reserve increase percentage |  | 0.05 |  |  |
Granted (in shares) |  | 0 |  |  |
2007 Equity Incentive Plan | Non Officer Employee |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Vesting percentage |  | 25.00% |  |  |
2007 Equity Incentive Plan | Officer |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Vesting period |  | 4 years |  |  |
2016 Equity Incentive Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Shares available for future award | 6,000,000 |  |  |  |
Previously authorized shares cancelled (in shares) | 705,699 |  |  |  |
Maximum shares subject to stock options and stock appreciation rights granted per employee per fiscal year |  | 300,000 |  |  |
Maximum shares subject to stock restricted stock and restricted stock unit awards granted per employee per fiscal year |  | 100,000 |  |  |
Maximum shares subject to performance share awards granted per employee per fiscal year |  | 50,000 |  |  |
Maximum shares subject to cash based or other stock-based awards granted per employee per fiscal year |  | 50,000 |  |  |
Maximum amount subject to performance unit awards granted per employee per fiscal year | $ |  | $ 500,000 |  |  |
Maximum amount subject to cash based or other stock based awards granted per employee per fiscal year | $ |  | $ 500,000 |  |  |
2016 Equity Incentive Plan | Non Officer Employee |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Vesting percentage |  | 25.00% |  |  |
2016 Equity Incentive Plan | Officer |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Vesting period |  | 4 years |  |  |
2016 Equity Incentive Plan | Director |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Maximum total fair market value of a share | $ |  | $ 150,000 |  |  |
2007 Employee Stock Purchase Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Maximum shares authorized |  |  |  |  | 500,000
Maximum annual plan shares authorized reserve increase percentage |  | 0.01 |  |  |
Maximum annual plan shares authorized reserve share increase |  | 250,000 |  |  |
Minimum hours to work per week to qualify for the Employee Stock Purchase Plan | item |  | 20 |  |  |
Minimum number of months per year needed to work to qualify for the Employee Stock Purchase Plan |  | 5 months |  |  |
Maximum percentage stock ownership to qualify for the Employee Stock Purchase Plan |  | 5 |  |  |
Maximum annual purchase rights per employee per year to enable granting of additional rights | $ |  | $ 25,000 |  |  |
Offering period length |  | 6 months |  |  |
Exercise price percentage of fair value of shares |  | 85.00% |  |  |
Maximum share purchase per employee per offering period number of shares multiplier |  | 1,000 |  |  |
Maximum share purchase per employee per offering period value multiplier |  | 2,083.33 |  |  |
2007 Employee Stock Purchase Plan | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |
Offering period length |  | 27 months |  |  |

X
- Definition Represents the maximum amount at which an employee's rights to purchase stock under all of the employee stock purchase plans would accrue for each calendar year above which additional rights to purchase stock may not be granted. + References No definition available. + Details
Name: | gsit_EmployeeStockPurchasePlanMaximumAnnualRightsToPurchase
Namespace Prefix: | gsit_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the number of shares per month used to calculate the maximum number of shares an employee can purchase in an offering period. + References No definition available. + Details
Name: | gsit_EmployeeStockPurchasePlanMaximumSharePurchaseMultiplier
Namespace Prefix: | gsit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage which employees must own less than in order to qualify for the Employee Stock Purchase Plan (ESPP). + References No definition available. + Details
Name: | gsit_EmployeeStockPurchasePlanMaximumStockOwnershipToQualify
Namespace Prefix: | gsit_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the value per month used to calculate the maximum number of shares an employee can purchase in an offering period. + References No definition available. + Details
Name: | gsit_EmployeeStockPurchasePlanMaximumValueMultiplier
Namespace Prefix: | gsit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum number of per week an employee needs to work to qualify for the Employee Stock Purchase Plan. + References No definition available. + Details
Name: | gsit_EmployeeStockPurchasePlanMinimumHoursPerWeekToQualify
Namespace Prefix: | gsit_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum number of months per year needed to work for employees to qualify for the Employee Stock Purchase Plan. + References No definition available. + Details
Name: | gsit_EmployeeStockPurchasePlanMinimumMonthsPerYearToQualify
Namespace Prefix: | gsit_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The offering period of the Employee Stock Purchase Plan. + References No definition available. + Details
Name: | gsit_EmployeeStockPurchasePlanOfferingPeriod
Namespace Prefix: | gsit_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the value divided by the fair market value of a share of the Company?s stock determined on the last trading day immediately preceding the date on which the applicable nonemployee award is granted. + References No definition available. + Details
Name: | gsit_MaximunTotalFairMarketValueOfShare
Namespace Prefix: | gsit_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the maximum amount of shares subject to cash based share awards and other stock-based awards that can be granted to an employee in any fiscal year. + References No definition available. + Details
Name: | gsit_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAnnualCashBasedAndOtherStockBasedShareAwardsPerEmployee
Namespace Prefix: | gsit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum amount of shares subject to performance share awards that can be granted to an employee in any fiscal year. + References No definition available. + Details
Name: | gsit_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAnnualPerformanceShareAwardsPerEmployee
Namespace Prefix: | gsit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum amount subject to cash based or other stock based unit awards that can be granted to an employee in any fiscal year. + References No definition available. + Details
Name: | gsit_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAnnualValueCashBasedAndOtherStockBasedAwardsGrantedPerEmployee
Namespace Prefix: | gsit_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the maximum amount subject to performance unit awards that can be granted to an employee in any fiscal year. + References No definition available. + Details
Name: | gsit_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAnnualValuePerformanceUnitAwardsGrantedPerEmployee
Namespace Prefix: | gsit_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the maximum annual percentage increase in the plan shares authorized reserve. + References No definition available. + Details
Name: | gsit_SharebasedCompensationArrangementBySharebasedPaymentAwardMaximumAnnualPercentageIncreasePlanReserve
Namespace Prefix: | gsit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum amount of shares subject to restricted stock and restricted stock unit awards that can be granted to an employee in any fiscal year. + References No definition available. + Details
Name: | gsit_SharebasedCompensationArrangementBySharebasedPaymentAwardMaximumAnnualRestrictedStockAndRestrictedStockUnitAwardsGrantedPerEmployee
Namespace Prefix: | gsit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum annual share increase in the plan shares authorized reserve. + References No definition available. + Details
Name: | gsit_SharebasedCompensationArrangementBySharebasedPaymentAwardMaximumAnnualShareIncreasePlanReserve
Namespace Prefix: | gsit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum amount of shares subject to stock options and stock appreciation rights that can be granted to an employee in any fiscal year. + References No definition available. + Details
Name: | gsit_SharebasedCompensationArrangementBySharebasedPaymentAwardMaximumAnnualStockOptionAndStockAppreciationRightsGrantedPerEmployee
Namespace Prefix: | gsit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of shares that were previously authorized and reserved for issuance under the Equity Plan that have been cancelled. + References No definition available. + Details
Name: | gsit_SharebasedCompensationArrangementBySharebasedPaymentAwardPreviouslyAuthorizedSharesCancelled
Namespace Prefix: | gsit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: 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 + Details
Name: | us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- 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 No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchase price of common stock expressed as a percentage of its fair value. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=gsit_EquityIncentivePlanYear2007Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=gsit_NonOfficerEmployeeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=us-gaap_OfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=gsit_EquityIncentivePlan2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=us-gaap_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=gsit_EmployeeStockPurchasePlanYear2007Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |