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Fair Value (Details 3) (Scottish Enterprise Agreement)	1 Months Ended	12 Months Ended
	Jun. 30, 2009 tranche	Dec. 31, 2012 USD ($)	Dec. 31, 2012 GBP (£)	Dec. 31, 2011 USD ($)	Dec. 31, 2011 GBP (£)	Jan. 06, 2010 USD ($)	Jan. 06, 2010 GBP (£)	Dec. 31, 2009 USD ($)	Jul. 02, 2009 USD ($)	Jul. 02, 2009 GBP (£)	Jun. 22, 2009 USD ($)	Jun. 22, 2009 GBP (£)
Scottish Enterprise Agreement
Maximum guaranteed amount potentially due to SE		$ 6,500,000		$ 6,200,000	£ 4,000,000			$ 8,000,000				£ 5,000,000
Modified payment for which parties agreed											1,700,000	1,000,000
Number of tranches in which modified payment will be paid	2
Amount paid					4,000,000	800,000	500,000		800,000	500,000
Potential amount to be paid if staffing levels reduced below the prescribed levels		6,100,000	3,800,000	5,900,000	3,800,000
Fair value of the liability		$ 20,000		$ 20,000
Expected volatility (as a percent)		30.00%	30.00%	30.00%	30.00%
Probability of falling below a minimum staffing level within prescribed time period (as a percent)		1.00%	1.00%	1.00%	1.00%

X

- Definition

Represents the probability assumption of falling staffing level below minimum prescribed levels within prescribed time period used in valuing an instrument.

+ References

No definition available.

+ Details

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X

- Definition

Represents the amount paid by the entity under the guarantee or each group of similar guarantees.

+ References

No definition available.

+ Details

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Namespace Prefix:	cycc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents the modified payment that will be paid by the entity for which the parties agreed.

+ References

No definition available.

+ Details

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Namespace Prefix:	cycc_
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X

- Definition

Represents the number of tranches in which modified payment will be paid by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	cycc_
Data Type:	xbrli:integerItemType
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X

- Definition

Represents the potential amount to be paid, if staffing levels reduced below the prescribed levels.

+ References

No definition available.

+ Details

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X

- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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X

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 45

-Paragraph 13

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

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X

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of contractual guarantees to which the Company is obligated as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12201-110248



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 45

-Paragraph 3, 8, 15

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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