Note 4 - Leases, Right-to-use Assets and Related Liabilities (Details Textual) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Lessee, Operating Lease, Right-of-Use Asset, Not yet Commenced, Fair Value	$ 2	$ 3

Represents the fair value of operating lease right-of-use assets related to leases not yet commenced.

No definition available.

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