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Stock-Based Compensation Arrangements (Details 6) (USD $)	1 Months Ended	12 Months Ended
	Feb. 29, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Minimum
Stock based compensation, additional disclosures
Vesting period		3 years
Maximum
Stock based compensation, additional disclosures
Vesting period		4 years
Stock options
Stock based compensation, additional disclosures
Income (expense) recognized due to revision of forfeiture rate		$ 40,000	$ 100,000	$ 200,000
Number of Federal Reserve securities whose weighted average is used for calculation of weighted average risk-free interest rate		2
Weighted-average remaining requisite service period of recognition of unrecognized compensation cost		2 years 9 months 29 days
Vesting period		4 years
Stock options | Minimum
Stock based compensation, additional disclosures
Forfeiture rate (as a percent)		0.00%
Stock options | Maximum
Stock based compensation, additional disclosures
Forfeiture rate (as a percent)		30.00%
Restricted Stock Units
Stock based compensation, additional disclosures
Total remaining unrecognized compensation cost		$ 100,000
Weighted-average remaining requisite service period of recognition of unrecognized compensation cost		1 year 22 days
Vesting period			3 years	3 years
Granted (in shares)	12,281	85,097	12,281	34,000

X

- Definition

Represents the number of Federal Reserve securities whose weighted average is used for calculation of weighted average risk-free interest rate.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

Represents the forfeiture rate used to estimate the pre-vesting option forfeitures.

+ References

No definition available.

+ Details

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Namespace Prefix:	cycc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the income expense recognized due to revision of the forfeiture rate.

+ References

No definition available.

+ Details

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X

- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

No definition available.

+ Details

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- Details

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X

- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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