Summary of Significant Accounting Policies - Summary of Customers Whose Revenue and Accounts Receivable Balances (Detail) - Customer Concentration Risk

3 Months Ended

6 Months Ended

12 Months Ended

Jun. 30, 2025

Jun. 30, 2024

Jun. 30, 2025

Jun. 30, 2024

Dec. 31, 2024

Revenue Benchmark

Concentration Risk [Line Items]

Concentration risk percentage

100.00%

Customer A | Revenue Benchmark

Concentration Risk [Line Items]

Concentration risk percentage

^[1]

20.00%

31.00%

17.00%

23.00%

Customer A | Accounts Receivable

Concentration Risk [Line Items]

Concentration risk percentage

^[2]

22.00%

Customer B | Revenue Benchmark

Concentration Risk [Line Items]

Concentration risk percentage

10.00%

0.00%

Customer B | Accounts Receivable

Concentration Risk [Line Items]

Concentration risk percentage

13.00%

Customer C | Revenue Benchmark

Concentration Risk [Line Items]

Concentration risk percentage

16.00%

13.00%

Customer C | Accounts Receivable

Concentration Risk [Line Items]

Concentration risk percentage

13.00%

Customer D | Revenue Benchmark

Concentration Risk [Line Items]

Concentration risk percentage

16.00%

Customer E | Accounts Receivable

Concentration Risk [Line Items]

Concentration risk percentage

13.00%

[1]	Consists of multiple U.S. government agencies, of which one government agency represented greater than 10% of total revenue for the three and six months ended June 30, 2024.
[2]	Consists of multiple U.S. government agencies, of which one government agency represented greater than 10% of total accounts receivable as of June 30, 2025.

Spire Global, Inc. 10-Q