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Stock-Based Compensation (Details) - shares	1 Months Ended
	Sep. 30, 2011	Mar. 31, 2024
Stock-Based Compensation
Number of shares of common stock reserved for issuance	6,277,777
Additional shares of common stock reserved for issuance	265,597	90,000
Increase in shares reserved for issuance as percentage of total number of shares of common stock outstanding	5.00%
Maximum annual increase	2,500,000

X

- Definition

Represents the additional shares of common stock reserved for issuance.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

X

- Definition

Represents the increase in shares reserved for issuance as percentage of total number of shares of common stock outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	gcts_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the maximum annual increase in shares reserved for issuance.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

Number of shares authorized for issuance under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

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Data Type:	xbrli:sharesItemType
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