Organization and Business Operations - Additional Information (Details)		9 Months Ended
	Feb. 05, 2019 USD ($)	Sep. 30, 2020 USD ($) $ / shares	Sep. 30, 2019 USD ($) $ / shares	Aug. 23, 2020 USD ($) subsidiary $ / shares	Dec. 31, 2019 USD ($) $ / shares
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of subsidiaries | subsidiary				2
Amount placed in trust account	$ 400,000,000
Proceeds from sale of Units in initial public offering	400,000,000		$ 400,000,000
Proceeds from sale of Private Placement Warrants to Sponsor			$ 10,000,000
Maximum maturity period		180 days
Regulatory withdrawal of interest from trust account, annual limit		$ 750,000
Regulatory withdrawal of interest from trust account, maximum period		24 months
Redemption percentage if business combination is not completed		100.00%
Number of days to seek shareholder approval for redemption of shares		2 days
Number of days to provide opportunity to shareholders to sell their shares		2 days
Dissolution expenses, maximum allowed		$ 100,000
Sponsor, Officers and Directors
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Ownership percentage of shares		20.00%
Maximum
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of months to complete business combination		24 months
Threshold net tangible assets		$ 5,000,001
Number of days to redeem the shares if Business combination is not completed		10 days
Minimum
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Percentage of fair market value		80.00%
Private Placement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Proceeds from sale of Private Placement Warrants to Sponsor	$ 10,000,000
Luminar
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock, value				$ 2,928,828,692
Maximum aggregate amount of additional capital raised				$ 30,000,000
Maximum percentage of outstanding capital stock				7.50%
Class A Common Stock
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock, par value | $ / shares		$ 0.0001			$ 0.0001
Unit price (in dollars per Unit) | $ / shares			$ 10.00
Common stock, value		$ 158			$ 129
Class A Common Stock | Luminar
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock, par value | $ / shares				$ 0.0001
Unit price (in dollars per Unit) | $ / shares				10.00
Class B Common Stock | Luminar
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock, par value | $ / shares				0.001
Unit price (in dollars per Unit) | $ / shares				$ 10.00