Velo3D, Inc. Quarterly report pursuant to Section 13 or 15(d)

Equity Instruments - Contingent Earnout Liabilities, Narrative (Details)

Equity Instruments - Contingent Earnout Liabilities, Narrative (Details) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 29, 2021 USD ($) leased_asset tranche $ / shares shares	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) shares	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Class of Stock [Line Items]
Gain on fair value of contingent earnout liabilities		$ 2,014	$ 0	$ 2,014	$ 0
Contingent earnout liabilities		$ 118,749		$ 118,749		$ 0
JAWS Spitfire
Class of Stock [Line Items]
Fair value of total earnout shares	$ 120,800
Eligible Velo3D Equityholders
Class of Stock [Line Items]
Earnout period	5 years
Number of tranches \| tranche	2
Eligible Velo3D Equityholders \| JAWS Spitfire
Class of Stock [Line Items]
Number of shares that the holders may receive \| shares	10,879,074
Eligible Velo3D Equityholders \| JAWS Spitfire \| Maximum
Class of Stock [Line Items]
Number of shares that the holders may receive \| shares	21,758,148			21,758,148
Eligible Velo3D Equityholders \| Contingent Earnout Liability, Scenario One
Class of Stock [Line Items]
Percentage of common stock outstanding	5.00%
Share price trigger (in usd per share) \| $ / shares	$ 12.50
Threshold trading days \| leased_asset	20
Threshold consecutive trading days	30 days
Eligible Velo3D Equityholders \| Contingent Earnout Liability, Scenario Two
Class of Stock [Line Items]
Percentage of common stock outstanding	5.00%
Share price trigger (in usd per share) \| $ / shares	$ 15.00
Threshold trading days \| leased_asset	20
Threshold consecutive trading days	30 days