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Commitments and Contingencies (Detail Textuals) - Daiichi Sankyo $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($)
Supply Commitment [Line Items]
Future milestone payments payable	$ 10
Period for which royalties will be paid following first commercial sale of licensed products	10 years
Notice period for termination of license by the entity for technical, scientific, efficacy, safety, or commercial reasons	6 months
Notice period for termination of license after launch of a sapacitabine-based product by the entity, or by either party for material default	12 months

X

- Definition

Represents the notice period for the termination of license after a launch of a sapacitabine-based product, or by either party for material default.

+ References

No definition available.

+ Details

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X

- Definition

Represents the period for which royalties will be paid following the first commercial sale of licensed products in the country.

+ References

No definition available.

+ Details

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Namespace Prefix:	cycc_
Data Type:	xbrli:durationItemType
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X

- Definition

The potential future milestone payments required to be made under certain contractual agreements.

+ References

No definition available.

+ Details

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Namespace Prefix:	cycc_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Represents the notice period for the termination of license by the reporting entity for technical, scientific, efficacy, safety, or commercial reasons.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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Namespace Prefix:
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Period Type: