Supernova Partners Acquisition Company III, Ltd Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Fair Value Measurement Inputs and Valuation Techniques (Details) - Significant Other Unobservable Inputs (Level 3)	Mar. 31, 2022	Dec. 31, 2021
Volatility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value measurement inputs	5.75	12.79
Stock price
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value measurement inputs	9.78	9.75
Expected life of the options to convert
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value measurement inputs	5.91	6.16
Risk-free rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value measurement inputs	2.410	1.373
Dividend yield
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value measurement inputs	0.000	0.000