Warrants (Details) - $ / shares	3 Months Ended	12 Months Ended
Mar. 31, 2024	Dec. 31, 2023
Warrants
Number of warrants issued	26,724,000
Number of warrants exercised		428,572
Number of warrants outstanding		9,200,000
Warrants expiration term	3 years
December 2020
Warrants
Number of warrants issued		2,514,285
Number of warrants expired/ cancelled		(2,514,285)
Exercise price of warrants		$ 3.50
Warrants expiration term		2 years
February 2021
Warrants
Number of warrants issued		342,857
Number of warrants expired/ cancelled		(342,857)
Exercise price of warrants		$ 3.50
Warrants expiration term		18 months
August 2021
Warrants
Number of warrants issued	299,000	999,997
Number of warrants outstanding		999,997
Exercise price of warrants		$ 3.50
Warrants expiration term		3 years
August 2021 \| Maximum
Warrants
Exercise price of warrants	$ 18.75
August 2021 \| Minimum
Warrants
Exercise price of warrants	$ 10.00
September 2021
Warrants
Number of warrants issued	300,000	428,571
Number of warrants outstanding		428,571
Exercise price of warrants	$ 5.00	$ 3.50
Warrants expiration term		3 years
February 2023 ~ June 2023
Warrants
Number of warrants issued	2,115,000	7,685,717
Number of warrants exercised		(428,572)
Number of warrants outstanding		7,257,145
Exercise price of warrants		$ 3.50
Warrants expiration term		3 years
February 2023 ~ June 2023 \| Maximum
Warrants
Exercise price of warrants	$ 18.75
February 2023 ~ June 2023 \| Minimum
Warrants
Exercise price of warrants	$ 10.00
July 2023
Warrants
Number of warrants issued	80,000	228,572
Number of warrants outstanding		228,572
Exercise price of warrants	$ 10.00	$ 3.50
Warrants expiration term		3 years
October 2023
Warrants
Number of warrants issued	100,000	285,715
Number of warrants outstanding		285,715
Exercise price of warrants	$ 10.00	$ 3.50
Warrants expiration term		3 years
:Public And Private Placement Warrants [Member]
Warrants
Number of warrants issued	23,830,000
Exercise price of warrants	$ 11.50

Represents the number of warrants exercised during the period.

No definition available.

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Namespace Prefix:	gcts_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of warrants expired/ cancelled during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	gcts_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of warrants issued during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	gcts_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-3

+ Details

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Balance Type:	na
Period Type:	instant

- 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

Name:	us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

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Period Type:	instant

- Details

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