Spire Global, Inc. Quarterly report [Sections 13 or 15(d)]

Fair Value Measurement - Additional Information (Detail)

Fair Value Measurement - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Mar. 12, 2025	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Jun. 11, 2025	Jun. 10, 2025	May 30, 2025	Sep. 27, 2023	Jun. 13, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Change in fair value of warrant liabilities		$ 120	$ (5,837)
Common Class A
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Blue Torch warrants exercise price						$ 0.0001
Common stock, Issued		33,529,765		33,107,807
Private Placement
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Purchase price	$ 8
Common stock, Sale of stock	4,843,750
Pre Funded Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Blue Torch warrants exercise price	$ 0.0001
Purchase price	$ 7.9999
Common stock, Sale of stock	156,250
Pre Funded Warrants \| Common Class A
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Common stock, Issued						156,249
Class of Warrant or Right, Outstanding						156,250
Blue Torch Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Common stock, Issued					112,611		404,286
Blue Torch Warrants \| Common Class A
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Blue Torch warrants exercise price					$ 5.44		$ 5.44
Class of Warrant or Right, Outstanding					208,483		825,623
Common stock market price					$ 11.83		$ 10.66
2022 Blue Torch Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Class of Warrant or Right, Outstanding									437,024
2022 Blue Torch Warrants \| Common Class A
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Class of Warrant or Right, Outstanding								597,082
2022 Blue Torch Warrants \| Original Exercise Price
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Blue Torch warrants exercise price								$ 16.08	$ 16.08
Exercise Price Of Urgent Warrants								16.08
2022 Blue Torch Warrants \| Reduced Exercise Price
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Blue Torch warrants exercise price								5.44
2023 Blue Torch Warrants \| Common Class A
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Blue Torch warrants exercise price								$ 5.44
Warrant To Urgent Capital Inc
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Blue Torch warrants exercise price									$ 16.08
Class of Warrant or Right, Outstanding		24,834							24,834
Warrant To Urgent Capital Inc \| Introducing Fee
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Deferred Finance Costs Gross									$ 600