Fair Value Measurements - Summary of Fair Value Measurements for Items (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total assets at fair value	$ 35,799	$ 53,963
Total liabilities at fair value	62,039	142,592
Public Warrants [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value	44,436
Private Placement Warrants [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value	17,603
Derivative Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value		44,810
Warrants Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value		97,782
U.S. Government and Government Agencies [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total assets at fair value	35,799	53,963
Level 1 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total assets at fair value	0	0
Total liabilities at fair value	44,436	0
Level 1 [Member] | Public Warrants [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value	44,436
Level 1 [Member] | Derivative Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value		0
Level 1 [Member] | Warrants Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value		0
Level 1 [Member] | U.S. Government and Government Agencies [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total assets at fair value	0	0
Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total assets at fair value	35,799	53,963
Total liabilities at fair value	17,603	0
Level 2 [Member] | Public Warrants [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value	0
Level 2 [Member] | Private Placement Warrants [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value	17,603
Level 2 [Member] | Derivative Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value		0
Level 2 [Member] | Warrants Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value		0
Level 2 [Member] | U.S. Government and Government Agencies [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total assets at fair value	35,799	53,963
Level 3 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total assets at fair value	0	0
Total liabilities at fair value	0	142,592
Level 3 [Member] | Public Warrants [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value	0
Level 3 [Member] | Private Placement Warrants [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value	0
Level 3 [Member] | Derivative Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value		44,810
Level 3 [Member] | Warrants Payable [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total liabilities at fair value		97,782
Level 3 [Member] | U.S. Government and Government Agencies [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total assets at fair value	$ 0	$ 0