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Stock-based Compensation - Compensation Cost Recognized for Stock Options and Restricted Stock Awards (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Compensation cost recognized for the stock options and restricted stock awards [Abstract] |  |
Total compensation cost for share-based payment arrangements recognized in the statement of operations | $ 753 | $ 1,080

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- Definition Compensation cost recognized for the stock options and restricted stock awards. + References No definition available. + Details
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Namespace Prefix: | cytx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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Balance Type: | debit
Period Type: | duration