Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 28, 2025	Dec. 29, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investment securities, available-for-sale	$ 51,257	$ 9,692
Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Total	83,899	125,094
Recurring \| Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Total	22,305	114,249
Recurring \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Total	61,594	10,845
Money market \| Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Cash and cash equivalents:	22,305	114,249
Money market \| Recurring \| Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Cash and cash equivalents:	22,305	114,249
U.S. Treasury Bills \| Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Cash and cash equivalents:	9,957
Investment securities, available-for-sale	51,257
U.S. Treasury Bills \| Recurring \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Cash and cash equivalents:	9,957
Investment securities, available-for-sale	51,257
US Corporate Bonds and US Denominated Foreign Bonds \| Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investment securities, available-for-sale		9,692
US Corporate Bonds and US Denominated Foreign Bonds \| Recurring \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Investment securities, available-for-sale		9,692
Derivative financial instruments \| Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Prepaid expenses and other current assets:	380	1,153
Derivative financial instruments \| Recurring \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Prepaid expenses and other current assets:	$ 380	$ 1,153

Vital Farms, Inc. 10-Q