Fair Value Measurements - Fair Value Liabilities Measured On Recurring Basis (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Liabilities:
Fair value of warrants and/or earn-out outstanding		$ 28,102	$ 12,166
Fair Value, Recurring
Assets:
Total assets		861
Liabilities:
Fair value of warrants and/or earn-out outstanding		70,839	30,247
Level 1 | Fair Value, Recurring
Liabilities:
Fair value of warrants and/or earn-out outstanding		14,864	7,168
Level 2 | Fair Value, Recurring
Liabilities:
Fair value of warrants and/or earn-out outstanding		13,238	4,998
Level 3 | Fair Value, Recurring
Assets:
Total assets		861
Liabilities:
Fair value of warrants and/or earn-out outstanding		42,737	18,081
Public Warrants | Fair Value, Recurring
Liabilities:
Fair value of warrants and/or earn-out outstanding	[1]	14,864	7,168
Public Warrants | Level 1 | Fair Value, Recurring
Liabilities:
Fair value of warrants and/or earn-out outstanding	[1]	14,864	7,168
Private Placement Warrants | Fair Value, Recurring
Liabilities:
Fair value of warrants and/or earn-out outstanding	[1]	13,238	4,998
Private Placement Warrants | Level 2 | Fair Value, Recurring
Liabilities:
Fair value of warrants and/or earn-out outstanding	[1]	13,238	4,998
Seller's Earn-Out | Fair Value, Recurring
Liabilities:
Fair value of warrants and/or earn-out outstanding	[1]	42,737	18,081
Seller's Earn-Out | Level 3 | Fair Value, Recurring
Liabilities:
Fair value of warrants and/or earn-out outstanding	[1]	42,737	$ 18,081
Investment in SymetryML Holdings | Fair Value, Recurring
Assets:
Total assets	[2]	861
Investment in SymetryML Holdings | Level 3 | Fair Value, Recurring
Assets:
Total assets	[2]	$ 861

[1] Refer to Note 16 — Seller's Earn-Out and Note 17 — Warrants to the Consolidated Financial Statements for the year ended December 31, 2021 for further information about the initial and subsequent measurement, including significant assumptions and valuation methodologies of these instruments.

[2] Refer to Note 20 — SymetryML and SymetryML Holdings below for further information about the initial measurement, including significant assumptions and valuation methodologies of this investment.