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Net Loss Per Share - Schedule of Potentially Dilutive Common Stock Equivalents that were Excluded From the Computation of Diluted Net Loss Per Share (Details) - shares shares in Thousands | 9 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023
Net Loss Per Share |  |
Potentially dilutive common stock equivalents that were excluded from the computation of diluted net loss per common share (in shares) | 48,718 | 4,690
Warrants |  |
Net Loss Per Share |  |
Potentially dilutive common stock equivalents that were excluded from the computation of diluted net loss per common share (in shares) | 26,273 | 2,214
Legacy GCT |  |
Net Loss Per Share |  |
Potentially dilutive common stock equivalents that were excluded from the computation of diluted net loss per common share (in shares) | 20,000 |
Sponsor Earnout Shares |  |
Net Loss Per Share |  |
Potentially dilutive common stock equivalents that were excluded from the computation of diluted net loss per common share (in shares) | 571 |
Convertible promissory notes |  |
Net Loss Per Share |  |
Potentially dilutive common stock equivalents that were excluded from the computation of diluted net loss per common share (in shares) | 713 | 1,806
Options issued and outstanding |  |
Net Loss Per Share |  |
Potentially dilutive common stock equivalents that were excluded from the computation of diluted net loss per common share (in shares) | 550 | 670
RSU |  |
Net Loss Per Share |  |
Potentially dilutive common stock equivalents that were excluded from the computation of diluted net loss per common share (in shares) | 611 |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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