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Stockholders' Equity (Details) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 13, 2010 | Oct. 31, 2010 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 13, 2010 | Apr. 09, 2012 | Jul. 11, 2011 Closing | Dec. 19, 2012 | Feb. 28, 2013 | Apr. 30, 2012 | Sep. 30, 2014
Preferred Stock [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 5,000,000 us-gaap_PreferredStockSharesAuthorized | 5,000,000 us-gaap_PreferredStockSharesAuthorized |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) |  |  | $ 0.001 us-gaap_PreferredStockParOrStatedValuePerShare | $ 0.001 us-gaap_PreferredStockParOrStatedValuePerShare |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  | 13,500 us-gaap_PreferredStockSharesIssued | 0 us-gaap_PreferredStockSharesIssued |  |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  | 5,311 us-gaap_PreferredStockSharesOutstanding | 0 us-gaap_PreferredStockSharesOutstanding |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from private placement of stock |  | $ 20,700,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement |  |  |  |  |  |  |  |  |  |
Common stock issued (in shares) |  | 4,600,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues |  |  |  |  |  |  |  |  |  |
Common stock at a purchase price (in dollars per unit) |  | $ 4.50 us-gaap_SharePrice | $ 0.49 us-gaap_SharePrice |  |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) |  | $ 4.23 us-gaap_SaleOfStockPricePerShare |  |  |  |  |  |  |  |  |  |
Deferred revenues |  |  | 112,000 us-gaap_DeferredRevenue | 212,000 us-gaap_DeferredRevenue |  |  |  |  |  | 2,379,000 us-gaap_DeferredRevenue |  |
Expected expiration period for recognition of deferred amount | 2 years |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  | 99,348,377 us-gaap_CommonStockSharesIssued | 71,305,375 us-gaap_CommonStockSharesIssued |  |  |  |  |  |  |  |
Offering price per share (in dollars per share) |  | $ 4.23 us-gaap_SaleOfStockPricePerShare |  |  |  |  |  |  |  |  |  |
Proceeds from sale of common stock |  |  | 19,001,000 us-gaap_ProceedsFromIssuanceOfCommonStock | 18,000,000 us-gaap_ProceedsFromIssuanceOfCommonStock | 24,953,000 us-gaap_ProceedsFromIssuanceOfCommonStock |  |  |  |  |  |  |
Warrant exercise price (in dollars per share) |  |  | $ 25.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 |  |  |  |  |  |  |  |  |
Dividends Payable |  |  | 1,200,000 us-gaap_DividendsPayableCurrentAndNoncurrent |  |  |  |  |  |  |  |  |
Shares with reduction in exercise price (in shares) |  |  | 3,384,601 cytx_SharesWithReductionInExercisePrice |  |  |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable |  |  | 600,000 us-gaap_DividendsPayableCurrentAndNoncurrent / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |  |  |  |  |  |
Astellas Pharma Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from private placement of stock |  |  |  |  |  | 10,000,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement / dei_LegalEntityAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |
Common stock issued (in shares) |  |  |  |  |  | 1,428,571 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) |  |  |  |  |  | $ 7.00 us-gaap_SaleOfStockPricePerShare / dei_LegalEntityAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |
Deferred revenues |  |  |  |  |  | 2,526,000 us-gaap_DeferredRevenue / dei_LegalEntityAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |
Offering price per share (in dollars per share) |  |  |  |  |  | $ 7.00 us-gaap_SaleOfStockPricePerShare / dei_LegalEntityAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |
Seaside 88, LP [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from private placement of stock |  |  |  |  |  |  |  | 6,000,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember |  |  |  |
Common stock issued (in shares) |  |  |  |  |  |  | 5,826,262 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember | 1,326,262 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember |  |  |  |
Sale of stock, price per share (in dollars per share) |  |  |  |  |  |  |  | $ 4.52 us-gaap_SaleOfStockPricePerShare / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember |  |  |  |
Common stock, shares issued (in shares) |  |  |  |  |  |  | 5,826,262 us-gaap_CommonStockSharesIssued / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember | 6,326,262 us-gaap_CommonStockSharesIssued / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember |  |  |  |
Number of closings |  |  |  |  |  |  |  | 20 cytx_NumberOfClosings / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember |  |  |  |
Offering price per share (in dollars per share) |  |  |  |  |  |  |  | $ 4.52 us-gaap_SaleOfStockPricePerShare / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember |  |  |  |
Purchase price of common stock, percent (in hundredths) |  |  |  |  |  |  |  | 88.00%cytx_PurchasePriceOfCommonStockPercent / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember |  |  |  |
Trading period |  |  |  |  |  |  |  | 10 days |  |  |  |
Proceeds from sale of common stock |  |  |  |  |  |  | 18,233,000 us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember | 6,000,000 us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember |  |  |  |
Number of shares terminated and not sold |  |  |  |  |  |  |  |  |  |  | (500,000)cytx_NumberOfSharesTerminatedAndNotSold / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember |
Seaside 88, LP [Member] | Initial Closing Period [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  |  |  |  |  |  | 1,326,262 us-gaap_CommonStockSharesIssued / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember / cytx_StockIssuancePeriodAxis = cytx_InitialClosingPeriodMember |  |  |  |
Purchase period of common stock |  |  |  |  |  |  |  | 30 days |  |  |  |
Seaside 88, LP [Member] | Every Two Weeks [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  |  |  |  |  |  | 250,000 us-gaap_CommonStockSharesIssued / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember / cytx_StockIssuancePeriodAxis = cytx_EveryTwoWeeksMember |  |  |  |
Purchase period of common stock |  |  |  |  |  |  |  | 14 days |  |  |  |
Seaside 88, LP [Member] | Ten Day Trading Period [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price of common stock, percent (in hundredths) |  |  |  |  |  |  |  | 90.25%cytx_PurchasePriceOfCommonStockPercent / dei_LegalEntityAxis = cytx_PrivatePlacementTwoMember / cytx_StockIssuancePeriodAxis = cytx_TenDayTradingPeriodMember |  |  |  |
Lazard Capital Markets, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from private placement of stock |  |  |  | 3,000,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement / dei_LegalEntityAxis = cytx_PrivatePlacementThreeMember |  |  |  |  | 20,007,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement / dei_LegalEntityAxis = cytx_PrivatePlacementThreeMember |  |  |
Common stock issued (in shares) |  |  |  | 7,020,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = cytx_PrivatePlacementThreeMember |  |  |  |  | 1,053,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = cytx_PrivatePlacementThreeMember |  |  |
Additional shares of common stock (in shares) |  |  |  | 1,053,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / dei_LegalEntityAxis = cytx_PrivatePlacementThreeMember |  |  |  |  |  |  |  |
Common stock at a purchase price (in dollars per unit) |  |  |  | $ 2.85 us-gaap_SharePrice / dei_LegalEntityAxis = cytx_PrivatePlacementThreeMember |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) |  |  |  | $ 2.69 us-gaap_SaleOfStockPricePerShare / dei_LegalEntityAxis = cytx_PrivatePlacementThreeMember |  |  |  |  |  |  |  |
Purchase period of common stock |  |  |  | 30 days |  |  |  |  |  |  |  |
Offering price per share (in dollars per share) |  |  |  | $ 2.69 us-gaap_SaleOfStockPricePerShare / dei_LegalEntityAxis = cytx_PrivatePlacementThreeMember |  |  |  |  |  |  |  |
Lorem Vascular [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from private placement of stock |  |  | 15,000,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement / dei_LegalEntityAxis = cytx_LoremVascularMember |  |  |  |  |  |  |  |  |
Common stock issued (in shares) |  |  | 8,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = cytx_LoremVascularMember |  |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) |  |  | $ 3.00 us-gaap_SaleOfStockPricePerShare / dei_LegalEntityAxis = cytx_LoremVascularMember |  |  |  |  |  |  |  |  |
Receivables from sale of stock |  |  | 9,000,000 us-gaap_ProceedsFromSaleOfFinanceReceivables / dei_LegalEntityAxis = cytx_LoremVascularMember |  |  |  |  |  |  |  |  |
Offering price per share (in dollars per share) |  |  | $ 3.00 us-gaap_SaleOfStockPricePerShare / dei_LegalEntityAxis = cytx_LoremVascularMember |  |  |  |  |  |  |  |  |
Lorem Vascular [Member] | First Closing of Stock sale [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from private placement of stock |  |  | 12,000,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement / dei_LegalEntityAxis = cytx_LoremVascularMember / cytx_StockIssuancePeriodAxis = cytx_FirstClosingOfStockSaleMember |  |  |  |  |  |  |  |  |
Common stock issued (in shares) |  |  | 4,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = cytx_LoremVascularMember / cytx_StockIssuancePeriodAxis = cytx_FirstClosingOfStockSaleMember |  |  |  |  |  |  |  |  |
Lorem Vascular [Member] | Second Closing of Stock sale [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from private placement of stock |  |  | $ 3,000,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement / dei_LegalEntityAxis = cytx_LoremVascularMember / cytx_StockIssuancePeriodAxis = cytx_SecondClosingOfStockSaleMember |  |  |  |  |  |  |  |  |
Common stock issued (in shares) |  |  | 4,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = cytx_LoremVascularMember / cytx_StockIssuancePeriodAxis = cytx_SecondClosingOfStockSaleMember |  |  |  |  |  |  |  |  |
Warrant liability [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issuance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Warrant exercise price (in dollars per share) |  |  | $ 0.5771 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_StatementClassOfStockAxis = us-gaap_WarrantMember |  |  |  |  |  |  |  |  | $ 2.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_StatementClassOfStockAxis = us-gaap_WarrantMember

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