Spire Global, Inc. Annual report pursuant to Section 13 and 15(d)

Public Offering - Additional Information (Details) - IPO	Sep. 14, 2020 $ / shares shares
Class Of Stock [Line Items]
Number of shares issued during period \| shares	23,000,000
Additional over allotment option to purchase \| shares	3,000,000
Shares issued, price per share \| $ / shares	$ 10.00
Class A Common Stock
Class Of Stock [Line Items]
Shares issued, price per share \| $ / shares	$ 11.50
Rights, description	Each Unit consists of one share of Class A common stock and one-half of one redeemable warrant ("Public Warrant"). Each whole Public Warrant entitles the holder to purchase one share of Class A common stock at a price of $11.50 per share, subject to adjustment (see Note 7).