Nature of the Business and Basis of Presentation - Narrative (Details)				3 Months Ended	6 Months Ended
	Jun. 10, 2021 USD ($) $ / shares shares	Jun. 09, 2021 $ / shares shares	Feb. 09, 2007 shares	Jun. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2021 convertibleNote member shares $ / shares	Dec. 31, 2020 $ / shares shares	Dec. 31, 2019 shares
Schedule of Equity Method Investments [Line Items]
Warrants outstanding (in shares)						0
Total proceeds | $	$ 150,000,000
Outstanding (in shares)	2,930,711					0	0
Recapitalization exchange ratio	27.80
Price per share of stock sold (in dollars per share) | $ / shares		$ 10.00
Merger consideration | $	$ 894,628
Enterprise value | $	900,000,000
Liabilities incurred | $	5,372,000
Number of Board of Directors members (in members) | member					9
Number of designated Board of Directors members (in members) | member					7
Proceeds from reverse recapitalization | $	399,511,000
Proceeds from issuance of private placement | $	150,000,000
Transaction cost payments | $	44,523,000
Repayments of assumed debt | $	$ 15,607,000
Transaction costs paid | $				$ 29,770,000
Transaction costs paid by counterparty | $				$ 21,848,000
Private Placement Warrants | Thunder Bridge Acquisition II, Ltd
Schedule of Equity Method Investments [Line Items]
Warrants outstanding (in shares)		8,650,000
Working Capital Warrants
Schedule of Equity Method Investments [Line Items]
Warrants issued upon conversion (in shares)					1,500,000
Escrow Shares
Schedule of Equity Method Investments [Line Items]
Earn-out liability (in shares)	3,450,000
Earnout shares
Schedule of Equity Method Investments [Line Items]
Earn-out liability (in shares)	10,000,000
Class G
Schedule of Equity Method Investments [Line Items]
SAFEs converted into Class A units (in shares)	10,019
Outstanding (in shares)	10,019
Common Unit, Class C, D, E and F
Schedule of Equity Method Investments [Line Items]
Outstanding (in shares)		1,251,566
Class A
Schedule of Equity Method Investments [Line Items]
Number of shares issued in transaction (in shares)			911,500
Outstanding (in shares)	1,381,424
Class A | Conversion of Class A units
Schedule of Equity Method Investments [Line Items]
Conversion of stock, shares converted (in shares)	77,497,793
Class B
Schedule of Equity Method Investments [Line Items]
Outstanding (in shares)	293,221
Class B | Conversion of Class B units
Schedule of Equity Method Investments [Line Items]
Conversion of stock, shares converted (in shares)	9,564,150
Thunder Bridge Acquisition II, Ltd
Schedule of Equity Method Investments [Line Items]
Redemption of shares (in shares)		9,877,106
Class A
Schedule of Equity Method Investments [Line Items]
SAFEs converted into Class A units (in shares)		284,925
Common stock, shares outstanding (in shares)				96,241,328	96,241,328	34,413,634
Conversion of stock, shares issued (in shares)		8,625,000
Number of shares issued in transaction (in shares)	15,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001			$ 0.1000	$ 0.1000	$ 0.1000
Class A | Conversion of Class A units
Schedule of Equity Method Investments [Line Items]
Conversion of stock, shares issued (in shares)	43,670,422
Class A | Conversion of Class B units
Schedule of Equity Method Investments [Line Items]
Conversion of stock, shares issued (in shares)	9,564,150
Class A | Class B
Schedule of Equity Method Investments [Line Items]
Shares subject to vesting (in shares)	1,791,147
Class A | First Convertible subordinated note | Convertible debt
Schedule of Equity Method Investments [Line Items]
SAFEs converted into Class A units (in shares)		185,000
Number of convertible equity instruments (in shares)					185,000
Class A | Thunder Bridge Acquisition II, Ltd
Schedule of Equity Method Investments [Line Items]
SAFEs converted into Class A units (in shares)		24,622,894
Warrants outstanding (in shares)		17,250,000
Class C | Second convertible subordinated note | Convertible debt
Schedule of Equity Method Investments [Line Items]
SAFEs converted into Class A units (in shares)		100,000
Number of convertible equity instruments (in shares) | convertibleNote					100,000
Class B
Schedule of Equity Method Investments [Line Items]
Conversion of stock, shares converted (in shares)		8,625,000
Class V
Schedule of Equity Method Investments [Line Items]
Common stock, shares outstanding (in shares)				33,827,371	33,827,371	33,373,294
Common stock, par value (in dollars per share) | $ / shares				$ 0.1000	$ 0.1000	$ 0.1000
Class V | Conversion of Class A units
Schedule of Equity Method Investments [Line Items]
Conversion of stock, shares issued (in shares)	33,827,371
Wuxi indie Microelectronics Ltd.
Schedule of Equity Method Investments [Line Items]
Ownership percentage by parent				50.00%	50.00%
Ay Dee Kay, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage by parent				74.00%	74.00%