Note 15 - Subsequent Events (Details Textual) $ in Millions	Jul. 17, 2019 USD ($)
Subsequent Event [Member] \| Anaerobic Digester [Member] \| DVO, Inc. [Member]
Property, Plant and Equipment, Amount Agreed to Purchase	$ 4.4

Represents the amount of property, plant and equipment agreed to be purchased as of a specified date.

No definition available.

Name:	gevo_PropertyPlantAndEquipmentAmountAgreedToPurchase
Namespace Prefix:	gevo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant