Warrant Liability (Details) - USD ($) $ in Thousands		9 Months Ended
Jun. 10, 2021	Sep. 30, 2021
Warrant Liability (Details) [Line Items]
Public warrants, description		The warrants may be exercised only during the period commencing on July 10, 2021 (30 days after the closing of the Transaction) through June 10, 2026. The Company may redeem the Public Warrants at a price of $0.01 per warrant upon 30 days’ notice, only in the event that the last sale price of the Class A common stock is at least $18.00 per share for any 20 trading days within a 30-trading day period ending on the third day prior to the date on which notice of redemption is given, provided there is an effective registration statement and current prospectus in effect with respect to the Class A common stock underlying such warrants during the 30 day redemption period.
Warrants outstanding	$ 74,408
Fair value		$ 103,492
Public Warrants [Member]
Warrant Liability (Details) [Line Items]
Warrant liability, description		In connection with the closing of the Transaction, holders of TB2 Class A ordinary shares automatically received Class A common stock of indie, and holders of TB2 warrants automatically received 17,250,000 warrants of indie with substantively identical terms (“Public Warrants”). At the Closing, 8,625,000 Class B ordinary shares of TB2 owned by the Sponsor, automatically converted into 8,625,000 shares of indie Class A common stock, and 8,650,000 private placement warrants held by the sponsor, each exercisable for one Class A ordinary share of TB2 at $11.50 per share, automatically converted into warrants to purchase one share of indie Class A common stock at $11.50 per share with substantively identical terms (“the “Private Placement Warrants”). Also at the Closing, TB2 issued 1,500,000 working capital warrants to an affiliate of the Sponsor in satisfaction of a working capital promissory note of $1,500 (the “Working Capital Warrants” and, together with the Private Placement Warrants, the “Private Warrants”). These Working Capital Warrants have substantially identical terms to the Private Placement Warrants.

Warrant Liability (Details) - USD ($)
$ in Thousands

9 Months Ended

Jun. 10, 2021

Sep. 30, 2021

Warrant Liability (Details) [Line Items]

The warrants may be exercised only during the period commencing on July 10, 2021 (30 days after the closing of the Transaction) through June 10, 2026. The Company may redeem the Public Warrants at a price of $0.01 per warrant upon 30 days’ notice, only in the event that the last sale price of the Class A common stock is at least $18.00 per share for any 20 trading days within a 30-trading day period ending on the third day prior to the date on which notice of redemption is given, provided there is an effective registration statement and current prospectus in effect with respect to the Class A common stock underlying such warrants during the 30 day redemption period.

Warrants outstanding

$ 74,408

Fair value

$ 103,492

Public Warrants [Member]

Warrant Liability (Details) [Line Items]

Warrant liability, description

In connection with the closing of the Transaction, holders of TB2 Class A ordinary shares automatically received Class A common stock of indie, and holders of TB2 warrants automatically received 17,250,000 warrants of indie with substantively identical terms (“Public Warrants”). At the Closing, 8,625,000 Class B ordinary shares of TB2 owned by the Sponsor, automatically converted into 8,625,000 shares of indie Class A common stock, and 8,650,000 private placement warrants held by the sponsor, each exercisable for one Class A ordinary share of TB2 at $11.50 per share, automatically converted into warrants to purchase one share of indie Class A common stock at $11.50 per share with substantively identical terms (“the “Private Placement Warrants”). Also at the Closing, TB2 issued 1,500,000 working capital warrants to an affiliate of the Sponsor in satisfaction of a working capital promissory note of $1,500 (the “Working Capital Warrants” and, together with the Private Placement Warrants, the “Private Warrants”). These Working Capital Warrants have substantially identical terms to the Private Placement Warrants.