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Label Element Value
Stock Issued During Period, Value, New Issues us-gaap_StockIssuedDuringPeriodValueNewIssues $ 14,979,000
Stock Issued During Period, Value, Stock Options Exercised us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised 49,000
Stock Issued During Period, Value, Stock Options Exercised us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised 4,000
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation (8,677,000)
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation 8,677,000
Membership Units Issued During Period, Value, New Issues xcur_MembershipUnitsIssuedDuringPeriodValueNewIssues 4,581,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 138,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 233,000
Additional Paid-in Capital [Member]  
Stock Issued During Period, Value, Stock Options Exercised us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised (12,000)
Stock Issued During Period, Value, Stock Options Exercised us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised 4,000
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation (246,000)
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation (18,530,000)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 138,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 233,000
Retained Earnings [Member]  
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation 18,837,000
Net Income (Loss) Attributable to Parent us-gaap_NetIncomeLoss (7,488,000)
Net Income (Loss) Attributable to Parent us-gaap_NetIncomeLoss (5,663,000)
Member Units [Member]  
Stock Issued During Period, Value, Stock Options Exercised us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised 61,000
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation $ (61,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised 153,750
Share Conversion During Period, Shares, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodSharesLimitedLiabilityCompanytoCorporation (153,750)
Common Stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised 13,125
Share Conversion During Period, Shares, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodSharesLimitedLiabilityCompanytoCorporation 153,750
Series A Preferred Stock [Member] | Preferred Stock [Member]  
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation $ 135,000
Share Conversion During Period, Shares, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodSharesLimitedLiabilityCompanytoCorporation 22,924,209
Preferred Class A [Member] | Preferred Stock [Member]  
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation $ (135,000)
Share Conversion During Period, Shares, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodSharesLimitedLiabilityCompanytoCorporation (22,924,210)
Series C Preferred Stock [Member] | Preferred Stock [Member]  
Stock Issued During Period, Value, New Issues us-gaap_StockIssuedDuringPeriodValueNewIssues $ 14,979,000
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation $ 18,060,000
Share Conversion During Period, Shares, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodSharesLimitedLiabilityCompanytoCorporation 7,921,662
Stock Issued During Period, Shares, New Issues us-gaap_StockIssuedDuringPeriodSharesNewIssues 6,542,783
Preferred Class B-I [Member] | Preferred Stock [Member]  
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation $ (5,371,000)
Share Conversion During Period, Shares, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodSharesLimitedLiabilityCompanytoCorporation (4,937,818)
Preferred Class C [Member] | Preferred Stock [Member]  
Membership Units Issued During Period, Shares, New Issues xcur_MembershipUnitsIssuedDuringPeriodSharesNewIssues 2,010,219
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation $ (18,060,000)
Membership Units Issued During Period, Value, New Issues xcur_MembershipUnitsIssuedDuringPeriodValueNewIssues $ 4,581,000
Share Conversion During Period, Shares, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodSharesLimitedLiabilityCompanytoCorporation (7,921,669)
Series B-1 Preferred Stock [Member] | Preferred Stock [Member]  
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation $ 5,371,000
Share Conversion During Period, Shares, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodSharesLimitedLiabilityCompanytoCorporation 4,937,813
Series B-2 Preferred Stock [Member] | Preferred Stock [Member]  
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation $ 3,641,000
Share Conversion During Period, Shares, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodSharesLimitedLiabilityCompanytoCorporation 2,827,844
Preferred Class B-II [Member] | Preferred Stock [Member]  
Share Conversion During Period, Value, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodValueLimitedLiabilityCompanytoCorporation $ (3,641,000)
Share Conversion During Period, Shares, Limited Liability Company to Corporation xcur_ShareConversionDuringPeriodSharesLimitedLiabilityCompanytoCorporation (2,827,848)