Capital Stock - Series G Preferred Stock Transactions - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified
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0 Months Ended |
12 Months Ended |
0 Months Ended |
1 Months Ended |
Sep. 10, 2014
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Aug. 06, 2014
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Jun. 26, 2014
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May 29, 2014
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Mar. 12, 2013
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Jan. 22, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Mar. 09, 2012
Directors
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Nov. 30, 2014
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Oct. 31, 2014
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Class of Stock [Line Items] |
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Number of shares of common stock sold |
4,444,445us-gaap_StockIssuedDuringPeriodSharesNewIssues |
6,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues |
5,500,000us-gaap_StockIssuedDuringPeriodSharesNewIssues |
3,333,333us-gaap_StockIssuedDuringPeriodSharesNewIssues |
5,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues |
10,125,000us-gaap_StockIssuedDuringPeriodSharesNewIssues |
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Issuance price per share |
$ 0.09us-gaap_EquityIssuancePerShareAmount |
$ 0.10us-gaap_EquityIssuancePerShareAmount |
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$ 0.20us-gaap_EquityIssuancePerShareAmount |
$ 0.20us-gaap_EquityIssuancePerShareAmount |
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Conversion ratio for each share |
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5.048us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion |
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Legal costs |
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$ 169us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts |
$ 178us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts |
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Series G Preferred Stock [Member] |
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Class of Stock [Line Items] |
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Convertible preferred stock, conversion price |
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$ 0.1981isco_ConvertiblePreferredStockConversionPrice / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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$ 0.40isco_ConvertiblePreferredStockConversionPrice / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Conversion ratio for each share |
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2.5us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Number of directors to be nominated by preferred shareholders |
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2isco_NumberOfDirectorsToBeNominatedByPreferredShareholders / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Number of independent directors out of directors to be nominated by preferred shareholders |
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1isco_NumberOfIndependentDirectorsOutOfDirectorsToBeNominatedByPreferredShareholders / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Legal costs |
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59us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Preferred stock, shares issued |
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5,000,000us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
0us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Preferred stock, shares outstanding |
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5,000,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
0us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Initial conversion price |
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$ 0.0576isco_ConversionOfStockInitialConversionPrice / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
$ 0.06447isco_ConversionOfStockInitialConversionPrice / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
Series G Preferred Stock [Member] | Minimum [Member] |
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Class of Stock [Line Items] |
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Convertible Redeemable Preferred stock, shares outstanding |
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1,000,000us-gaap_TemporaryEquitySharesOutstanding / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Series G Preferred Stock [Member] | AR Partners, LLC [Member] |
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Class of Stock [Line Items] |
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Number of shares of common stock sold |
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5,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = isco_ArPartnersLlcMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Issuance price per share |
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$ 1.00us-gaap_EquityIssuancePerShareAmount / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = isco_ArPartnersLlcMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Total proceeds |
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$ 5,000us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = isco_ArPartnersLlcMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember |
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Convertible Redeemable Series G Preferred stock [Member] |
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Class of Stock [Line Items] |
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Convertible Redeemable Preferred stock, shares outstanding |
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0us-gaap_TemporaryEquitySharesOutstanding / us-gaap_StatementClassOfStockAxis = isco_RedeemableConvertibleSeriesGPreferredStockMember |
5,000,000us-gaap_TemporaryEquitySharesOutstanding / us-gaap_StatementClassOfStockAxis = isco_RedeemableConvertibleSeriesGPreferredStockMember |
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Convertible Redeemable Preferred stock, shares issued |
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0us-gaap_TemporaryEquitySharesIssued / us-gaap_StatementClassOfStockAxis = isco_RedeemableConvertibleSeriesGPreferredStockMember |
5,000,000us-gaap_TemporaryEquitySharesIssued / us-gaap_StatementClassOfStockAxis = isco_RedeemableConvertibleSeriesGPreferredStockMember |
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