Nature of the Business and Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Thousands					1 Months Ended		9 Months Ended		13 Months Ended
	Sep. 18, 2023	Feb. 21, 2023	Feb. 09, 2023	Aug. 26, 2022	Mar. 31, 2023	Feb. 28, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 21, 2023	Jun. 20, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)				$ 0.0001
Total proceeds									$ 70,339
Business combinations, net of cash							$ 94,989	$ 8,705
Ay Dee Kay, LLC
Business Acquisition [Line Items]
Ownership percentage by parent							89.00%		89.00%			85.00%
Ay Dee Kay, LLC | Indie Semiconductor
Business Acquisition [Line Items]
Ownership percentage by parent							55.00%		55.00%
Ay Dee Kay, LLC | Wuxi indie Microelectronics Ltd.
Business Acquisition [Line Items]
Ownership percentage by parent							38.00%		38.00%			38.00%
GEO
Business Acquisition [Line Items]
Business combinations, net of cash			$ 93,448
Equity interest issued or issuable (in shares)			1,907,180
Total equity consideration			$ 20,979		$ 96,535
Payable period			24 months
GEO | Convertible debt into Class A common shares
Business Acquisition [Line Items]
Equity interest issued or issuable (in shares)			6,868,768
Total equity consideration			$ 75,556
Purchase price - contingent considerations			$ 63,093
Silicon Radar
Business Acquisition [Line Items]
Business combinations, net of cash		$ 9,245				$ 9,245
Total equity consideration						9,834
Silicon Radar | Convertible debt into Class A common shares
Business Acquisition [Line Items]
Equity interest issued or issuable (in shares)		982,445
Purchase price - contingent considerations	$ 9,979
Silicon Radar | Purchase price, equity consideration
Business Acquisition [Line Items]
Total equity consideration						9,834
Exalos
Business Acquisition [Line Items]
Business combinations, net of cash						(3,439)
Total equity consideration						$ 45,291
Holdback amount	$ 2,500						$ 0		$ 0
Exalos | Convertible debt into Class A common shares
Business Acquisition [Line Items]
Equity interest issued or issuable (in shares)	6,613,786
Purchase price - contingent considerations	$ 13,225
Exalos | Common Stock Class A
Business Acquisition [Line Items]
Total equity consideration	$ 42,791
Convertible debt into Class A common shares
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)							$ 0.1000		$ 0.1000	$ 0.0001		$ 0.1000
Number of shares issued in transaction (in shares)									7,351,259
Price per share of stock sold (in dollars per share)							$ 9.57		$ 9.57
Common stock, shares authorized (in shares)							400,000,000		400,000,000	400,000,000	250,000,000	250,000,000
At-The-Market Offering
Business Acquisition [Line Items]
Sale of stock, aggregate sales price				$ 150,000
Sale of stock, shares reserved for future issuance									$ 79,661