Spire Global, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Cover Page
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Convertible Notes - Additional Information (Detail)

v3.21.2

Convertible Notes - Additional Information (Detail) $ in Thousands	1 Months Ended		2 Months Ended	3 Months Ended		9 Months Ended		16 Months Ended
	May 31, 2021	Dec. 31, 2012	Feb. 28, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Oct. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Debt issuance costs, net				$ 26,291		$ 26,291			$ 4,798
Stockholders' equity note, stock split, exchange ratio		1.8282
New Spire Class A Common stock [Member]
Debt Instrument [Line Items]
Stockholders' equity note, stock split, exchange ratio						1.7058
2019 and 2020 convertible notes [Member]
Debt Instrument [Line Items]
Proceeds from issuance of convertible debt								$ 42,884
Debt instrument interest rate stated percentage								8.00%
Debt instrument maturity date	Jul. 31, 2022							Jan. 29, 2022
Percentage of principal payment to be paid on maturity date if unconverted								5.00%
Debt issuance costs, net								$ 392
2021 convertible notes [Member]
Debt Instrument [Line Items]
Proceeds from issuance of convertible debt			$ 20,000
Debt instrument interest rate stated percentage			8.00%
Debt issuance costs, net			$ 62
Debt Instrument convertible conversion ratio						13.6466
Debt instrument term			4 years
Convertible notes payable [Member]
Debt Instrument [Line Items]
Accrued interest				0		$ 0			$ 5,944
Interest expense debt				$ 1,452	$ 1,182	1,550	$ 3,385
Debt Instrument, Increase, Accrued Interest						$ 1,698
2019 Convertible Notes [Member]
Debt Instrument [Line Items]
Debt Instrument convertible conversion ratio						2.4808
2020 Convertible Notes [Member]
Debt Instrument [Line Items]
Debt Instrument convertible conversion ratio						2.4808

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