Spire Global, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Fair Value Measurement - Summary of Warrants Classified as Equity That Are Measured at Fair Value on Nonrecurring Basis (Details)

Fair Value Measurement - Summary of Warrants Classified as Equity That Are Measured at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Equity:
Cash and cash equivalents at carrying value	$ 29,136
Investments
Equity:
Cash and cash equivalents at carrying value	11,725	$ 23,116
Cash and Cash Equivalents, Fair Value Disclosure	11,726	23,084
Marketable Securities, Unrealized Gains	2	0
Marketable Securities, Unrealized Losses	(1)	(32)
U.S. government and agency securities \| Investments
Equity:
Debt Securities, Available-for-Sale, Amortized Cost, Total	1,492	11,272
Marketable Securities, Unrealized Gains	0	0
Marketable Securities, Unrealized Losses	(1)	(3)
Debt Securities, Available-for-Sale	1,491	11,269
Cash and Cash Equivalents [Member]
Equity:
Cash and cash equivalents at carrying value	29,136	47,197
Cash and Cash Equivalents, Fair Value Disclosure	29,136	47,196
Marketable Securities, Unrealized Gains	0	0
Marketable Securities, Unrealized Losses	0	(1)
U.S. treasury bills and bonds \| Investments
Equity:
Cash and cash equivalents at carrying value	8,838	1,495
Cash and Cash Equivalents, Fair Value Disclosure	8,840	1,494
Marketable Securities, Unrealized Gains	2	0
Marketable Securities, Unrealized Losses	0	(1)
Commercial Paper \| Investments
Equity:
Debt Securities, Available-for-Sale, Amortized Cost, Total	1,395	2,578
Marketable Securities, Unrealized Gains	0	0
Marketable Securities, Unrealized Losses	0	(2)
Debt Securities, Available-for-Sale	1,395	2,576
Commercial Paper \| Cash and Cash Equivalents [Member]
Equity:
Cash and cash equivalents at carrying value		2,098
Cash and Cash Equivalents, Fair Value Disclosure		2,097
Marketable Securities, Unrealized Gains		0
Marketable Securities, Unrealized Losses		(1)
Corporate Securities \| Investments
Equity:
Debt Securities, Available-for-Sale, Amortized Cost, Total		7,771
Marketable Securities, Unrealized Gains		0
Marketable Securities, Unrealized Losses		(26)
Debt Securities, Available-for-Sale		7,745
Cash [Member] \| Cash and Cash Equivalents [Member]
Equity:
Cash and cash equivalents at carrying value	19,022	39,919
Cash and Cash Equivalents, Fair Value Disclosure	19,022	39,919
Marketable Securities, Unrealized Gains	0	0
Marketable Securities, Unrealized Losses	0	0
Money Market Funds \| Cash and Cash Equivalents [Member]
Equity:
Cash and cash equivalents at carrying value	10,114	5,180
Cash and Cash Equivalents, Fair Value Disclosure	10,114	5,180
Marketable Securities, Unrealized Gains	0	0
Marketable Securities, Unrealized Losses	$ 0	$ 0