Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) (USD $)
|
12 Months Ended |
0 Months Ended |
12 Months Ended |
0 Months Ended |
|
|
|
Mar. 29, 2014
|
Nov. 10, 2011
|
Mar. 28, 2015
|
Feb. 19, 2013
|
Jul. 08, 2013
|
Feb. 23, 2015
|
Feb. 16, 2015
|
Feb. 28, 2014
|
Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) [Line Items] |
|
|
|
|
|
|
|
|
Preferred Stock, Shares Issued (in Shares) |
|
|
18,533.51us-gaap_PreferredStockSharesIssued
|
|
|
|
|
|
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs |
$ 41,000us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
|
|
|
|
|
|
|
|
Proceeds from Issuance of Preferred Stock and Preference Stock |
817,000us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
|
|
|
|
|
|
|
|
Series B Preferred Stock [Member] |
|
|
|
|
|
|
|
|
Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) [Line Items] |
|
|
|
|
|
|
|
|
Proceeds from Issuance of Preferred Stock, Preference Stock, and Warrants |
|
2,199,000us-gaap_ProceedsFromIssuanceOfPreferredStockPreferenceStockAndWarrants / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
|
|
|
|
|
|
|
Preferred Stock, Shares Issued (in Shares) |
|
9,997us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
|
9,997.00us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
|
|
|
|
|
|
Sale of Stock, Price Per Share (in Dollars per share) |
|
$ 220us-gaap_SaleOfStockPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
|
|
|
|
|
|
|
Preferred Stock, Value, Issued |
|
|
2,000,000us-gaap_PreferredStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
|
|
|
|
|
|
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs |
|
|
202,000us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
|
|
|
|
|
|
Series C Preferred Stock [Member] |
|
|
|
|
|
|
|
|
Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) [Line Items] |
|
|
|
|
|
|
|
|
Preferred Stock, Shares Issued (in Shares) |
|
|
3,424.65us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember
|
3,424.65us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember
|
|
|
|
|
Sale of Stock, Price Per Share (in Dollars per share) |
|
|
|
$ 146.00us-gaap_SaleOfStockPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember
|
|
|
|
|
Preferred Stock, Value, Issued |
|
|
457,000us-gaap_PreferredStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember
|
|
|
|
|
|
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs |
|
|
43,000us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember
|
|
|
|
|
|
Proceeds from Issuance of Preferred Stock and Preference Stock |
|
|
|
500,000us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember
|
|
|
|
|
Series D Preferred Stock [Member] | SPA [Member] | Unallocated [Member] |
|
|
|
|
|
|
|
|
Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) [Line Items] |
|
|
|
|
|
|
|
|
Proceeds from Issuance of Convertible Preferred Stock |
|
|
|
|
817,000us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember / us-gaap_StatementScenarioAxis = giga_UnallocatedMember / us-gaap_TransactionTypeAxis = giga_SPAMember
|
|
|
|
Series D Preferred Stock [Member] | SPA [Member] | Allocated [Member] |
|
|
|
|
|
|
|
|
Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) [Line Items] |
|
|
|
|
|
|
|
|
Proceeds from Issuance of Convertible Preferred Stock |
|
|
|
|
498,000us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember / us-gaap_StatementScenarioAxis = giga_AllocatedMember / us-gaap_TransactionTypeAxis = giga_SPAMember
|
|
|
|
Proceeds from Issuance of Common Stock |
|
|
|
|
360,000us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember / us-gaap_StatementScenarioAxis = giga_AllocatedMember / us-gaap_TransactionTypeAxis = giga_SPAMember
|
|
|
|
Debt Instrument, Convertible, Conversion Price (in Dollars per share) |
|
|
|
|
$ 0.97us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember / us-gaap_StatementScenarioAxis = giga_AllocatedMember / us-gaap_TransactionTypeAxis = giga_SPAMember
|
|
|
|
Series D Preferred Stock [Member] | SPA [Member] |
|
|
|
|
|
|
|
|
Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) [Line Items] |
|
|
|
|
|
|
|
|
Debt Issuance Cost |
|
|
|
|
41,000us-gaap_DebtIssuanceCosts / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember / us-gaap_TransactionTypeAxis = giga_SPAMember
|
|
|
|
Series D Preferred Stock [Member] |
|
|
|
|
|
|
|
|
Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) [Line Items] |
|
|
|
|
|
|
|
|
Preferred Stock, Shares Issued (in Shares) |
|
|
5,111.86us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember
|
|
5,111.86us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember
|
|
|
|
Proceeds from Issuance of Convertible Preferred Stock |
|
|
|
|
858,000us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember
|
|
|
|
Debt Instrument, Convertible, Beneficial Conversion Feature |
|
|
|
|
$ 238,000us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember
|
|
|
|
New Warrant [Member] | Alara Capital AVI II, LLC [Member] |
|
|
|
|
|
|
|
|
Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) [Line Items] |
|
|
|
|
|
|
|
|
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares) |
|
|
|
|
|
194,437us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = giga_AlaraCapitalAVIIILLCMember / us-gaap_ClassOfWarrantOrRightAxis = giga_NewWarrantMember
|
898,634us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = giga_AlaraCapitalAVIIILLCMember / us-gaap_ClassOfWarrantOrRightAxis = giga_NewWarrantMember
|
|
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) |
|
|
|
|
|
$ 1.76us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = giga_AlaraCapitalAVIIILLCMember / us-gaap_ClassOfWarrantOrRightAxis = giga_NewWarrantMember
|
$ 1.78us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = giga_AlaraCapitalAVIIILLCMember / us-gaap_ClassOfWarrantOrRightAxis = giga_NewWarrantMember
|
|
New Warrant [Member] |
|
|
|
|
|
|
|
|
Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) [Line Items] |
|
|
|
|
|
|
|
|
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares) |
|
|
|
|
511,186us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = giga_NewWarrantMember
|
|
|
|
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) |
|
|
|
|
$ 1.43us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = giga_NewWarrantMember
|
|
|
|
Alara Capital AVI II, LLC [Member] |
|
|
|
|
|
|
|
|
Note 16 - Series B, C, D Convertible Voting Perpetual Preferred Stock and Warrants (Details) [Line Items] |
|
|
|
|
|
|
|
|
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares) |
|
|
|
|
|
|
|
1,017,405us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = giga_AlaraCapitalAVIIILLCMember
|
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) |
|
|
|
|
|
|
|
$ 1.43us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = giga_AlaraCapitalAVIIILLCMember
|