Note 1 - Nature of Business and Financial Condition	12 Months Ended
Dec. 31, 2019
Notes to Financial Statements
Business Description and Basis of Presentation [Text Block]	1. Nature of Business and Financial Condition Nature of Business . Gevo, Inc. (“Gevo” or the “Company,” which, unless otherwise indicated, refers to Gevo, Inc. and its subsidiaries) are commercializing the next generation of jet fuel, gasoline and diesel fuel with the potential to achieve zero carbon emissions and address the market need of reducing greenhouse gas (“GHG”) emissions with sustainable alternatives. The Company uses low-carbon renewable resource-based carbohydrates as raw materials (primarily from non-food corn, but also sugar cane, molasses or other cellulosic sugars) and is in an advanced state of developing renewable electricity and renewable natural gas (“RNG”) for use in production processes. As a result, Gevo is able to produce low-carbon fuels with substantially reduced carbon intensity (as measured by the level of GHG emissions compared to standard petroleum fossil-based fuels across their lifecycle). The Company’s products perform as well or better than traditional fossil-based fuels in infrastructure and engines, but with substantially reduced GHG emissions. In addition to addressing the environmental problems of fossil-based carbon fuels, the Company’s technology also enables certain plastics, such as polyester, to be made with more sustainable ingredients. Gevo’s ability to penetrate the growing low-carbon fuels market depends on the price of oil and the value of abating carbon emissions that would otherwise increase GHG emissions. The Company believes that its proven, patented technology that enables the use of a variety of low-carbon sustainable feedstocks to produce price-competitive, low-carbon products, such as alcohol-to-jet fuel (“ATJ”), gasoline components like isooctane and isobutanol and diesel fuel, yields the potential to generate project and corporate returns that would justify the build-out of a multi-billion-dollar business. Ultimately, the Company believes that the attainment of profitable operations is dependent upon future events, including (i) completing certain capital improvements at Company’s production facility located in Luverne, Minnesota (the "Luverne Facility") to increase the production capacity of renewable jet fuel and isooctane and other related products that can be made from isobutanol; (ii) completing the Company's development activities resulting in commercial production and sales of renewable hydrocarbon products and low-carbon ethanol; (iii) obtaining adequate financing to complete the Company's development activities, including the build out of renewable hydrocarbon capacity; (iv) gaining market acceptance and demand for the Company's products and services; (v) attracting and retaining qualified personnel; and (vi) achieving a level of revenues adequate to support the Company's cost structure. Financial Condition . For the years ended December 31, 2019 and 2018, the Company incurred a consolidated net loss of $28.7 million and $28.0 million, respectively, and had an accumulated deficit of $458.0 million as of December 31, 2019. The Company’s cash and cash equivalents as of December 31, 2019 totaled $16.3 million and are expected to be used for the following purposes: (i) operating activities of the Luverne Facility; (ii) operating activities at the Company’s corporate headquarters in Colorado, including research and development work; (iii) capital improvements primarily associated with the Luverne Facility; (iv) exploration of strategic alternatives and new financings; and (v) debt service obligations. The Company expects to incur future net losses as it continues to fund the development and commercialization of its product candidates. To date, the Company has financed its operations primarily with proceeds from multiple sales of equity and debt securities, borrowings under debt facilities and product sales. The Company’s transition to profitability is dependent upon, among other things, the successful development and commercialization of its product candidates and the achievement of a level of revenues adequate to support the Company’s cost structure. The Company may never achieve profitability or positive cash flows, and unless and until it does, the Company will continue to need to raise additional cash. Management intends to fund future operations through additional private and/or public offerings of debt or equity securities. In addition, the Company may seek additional capital through arrangements with strategic partners or from other sources, it may seek to restructure its debt and it will continue to address its cost structure. Notwithstanding, there can be no assurance that the Company will be able to raise additional funds or achieve or sustain profitability or positive cash flows from operations. Existing working capital was not sufficient to meet the cash requirements to fund planned operations through the period that is one year after the date the Company’s audited 2019 year-end financial statements were issued. These conditions raise substantial doubt about the Company’s ability to continue as a going concern. The Company’s inability to continue as a going concern may potentially affect the Company’s rights and obligations under its senior secured debt and issued and outstanding convertible notes. The accompanying financial statements have been prepared assuming that the Company will continue as a going concern and do not include adjustments that might result from the outcome of this uncertainty. This basis of accounting contemplates the recovery of the Company’s assets and the satisfaction of liabilities in the normal course of business. At-the-Market Offering Program. In February 2018, the Company commenced an at-the-market offering program, which allows it to sell and issue shares of its common stock from time-to-time. The at-the-market offering program was amended multiple times during 2018 to increase the available capacity under the at-the-market offering program by an aggregate of approximately $84.9 million. In August 2019, the at-the-market offering was further amended to increase the available capacity under the at-the-market offering program by $10.7 million. During the year ended December 31, 2019, the Company issued 3,965,688 shares of common stock under the at-the-market offering program for gross proceeds of $11.5 million, net of commissions and other offering related expenses. As of December 31, 2019, the Company has remaining capacity to issue up to approximately $8.8 million of common stock under the at-the-market offering program. From January 1, 2020 to February 29, 2020, the Company issued 425,766 shares of common stock under the at-the-market offering program for gross proceeds of $0.9 million, net of commissions and other offering related expenses. As of February 29, 2019, we had capacity to issue up to $7.8 million of common stock under the at-the-market offering program. During the year ended December 31, 2018, the Company issued 6,936,930 shares of common stock under the at-the-market offering program for net proceeds of $38.9 million, net of commissions and offering related expenses. Reverse Stock Split. On June 1, 2018, the Company effected a reverse stock split of the outstanding shares of its common stock by a ratio of one -for- twenty (the "Reverse Stock Split"), and its common stock began trading on the Nasdaq Capital Market on a Reverse Stock Split-basis on June 4, 2018.

Nature of Business and Financial Condition

Nature of Business

. Gevo, Inc. (“Gevo” or the “Company,” which, unless otherwise indicated, refers to Gevo, Inc. and its subsidiaries) are commercializing the next generation of jet fuel, gasoline and diesel fuel with the potential to achieve

zero

carbon emissions and address the market need of reducing greenhouse gas (“GHG”) emissions with sustainable alternatives. The Company uses low-carbon renewable resource-based carbohydrates as raw materials (primarily from non-food corn, but also sugar cane, molasses or other cellulosic sugars) and is in an advanced state of developing renewable electricity and renewable natural gas (“RNG”) for use in production processes. As a result, Gevo is able to produce low-carbon fuels with substantially reduced carbon intensity (as measured by the level of GHG emissions compared to standard petroleum fossil-based fuels across their lifecycle). The Company’s products perform as well or better than traditional fossil-based fuels in infrastructure and engines, but with substantially reduced GHG emissions. In addition to addressing the environmental problems of fossil-based carbon fuels, the Company’s technology also enables certain plastics, such as polyester, to be made with more sustainable ingredients.

Gevo’s ability to penetrate the growing low-carbon fuels market depends on the price of oil and the value of abating carbon emissions that would otherwise increase GHG emissions. The Company believes that its proven, patented technology that enables the use of a variety of low-carbon sustainable feedstocks to produce price-competitive, low-carbon products, such as alcohol-to-jet fuel (“ATJ”), gasoline components like isooctane and isobutanol and diesel fuel, yields the potential to generate project and corporate returns that would justify the build-out of a multi-billion-dollar business.

Ultimately, the Company believes that the attainment of profitable operations is dependent upon future events, including (i) completing certain capital improvements at Company’s production facility located in Luverne, Minnesota (the "Luverne Facility") to increase the production capacity of renewable jet fuel and isooctane and other related products that can be made from isobutanol; (ii) completing the Company's development activities resulting in commercial production and sales of renewable hydrocarbon products and low-carbon ethanol; (iii) obtaining adequate financing to complete the Company's development activities, including the build out of renewable hydrocarbon capacity; (iv) gaining market acceptance and demand for the Company's products and services; (v) attracting and retaining qualified personnel; and (vi) achieving a level of revenues adequate to support the Company's cost structure.

Financial Condition

. For the years ended

December 31, 2019

and

2018,

the Company incurred a consolidated net loss of

$28.7

million and

$28.0

million, respectively, and had an accumulated deficit of

$458.0

million as of

December 31, 2019.

The Company’s cash and cash equivalents as of

December 31, 2019

totaled

$16.3

million and are expected to be used for the following purposes: (i) operating activities of the Luverne Facility; (ii) operating activities at the Company’s corporate headquarters in Colorado, including research and development work; (iii) capital improvements primarily associated with the Luverne Facility; (iv) exploration of strategic alternatives and new financings; and (v) debt service obligations.

The Company expects to incur future net losses as it continues to fund the development and commercialization of its product candidates. To date, the Company has financed its operations primarily with proceeds from multiple sales of equity and debt securities, borrowings under debt facilities and product sales. The Company’s transition to profitability is dependent upon, among other things, the successful development and commercialization of its product candidates and the achievement of a level of revenues adequate to support the Company’s cost structure. The Company

may

never achieve profitability or positive cash flows, and unless and until it does, the Company will continue to need to raise additional cash. Management intends to fund future operations through additional private and/or public offerings of debt or equity securities. In addition, the Company

may

seek additional capital through arrangements with strategic partners or from other sources, it

may

seek to restructure its debt and it will continue to address its cost structure. Notwithstanding, there can be

assurance that the Company will be able to raise additional funds or achieve or sustain profitability or positive cash flows from operations.

Existing working capital was

not

sufficient to meet the cash requirements to fund planned operations through the period that is

one

year after the date the Company’s audited

2019

year-end financial statements were issued. These conditions raise substantial doubt about the Company’s ability to continue as a going concern. The Company’s inability to continue as a going concern

may

potentially affect the Company’s rights and obligations under its senior secured debt and issued and outstanding convertible notes. The accompanying financial statements have been prepared assuming that the Company will continue as a going concern and do

not

include adjustments that might result from the outcome of this uncertainty. This basis of accounting contemplates the recovery of the Company’s assets and the satisfaction of liabilities in the normal course of business.

At-the-Market Offering Program.

February 2018,

the Company commenced an at-the-market offering program, which allows it to sell and issue shares of its common stock from time-to-time. The at-the-market offering program was amended multiple times during

2018

to increase the available capacity under the at-the-market offering program by an aggregate of approximately

$84.9

million. In

August 2019,

the at-the-market offering was further amended to increase the available capacity under the at-the-market offering program by

$10.7

million.

During the year ended

December 31, 2019,

the Company issued

3,965,688

shares of common stock under the at-the-market offering program for gross proceeds of

$11.5

million, net of commissions and other offering related expenses. As of

December 31, 2019,

the Company has remaining capacity to issue up to approximately

$8.8

million of common stock under the at-the-market offering program.

From

January 1, 2020

February

29,

2020,

the Company issued

425,766

shares of common stock under the at-the-market offering program for gross proceeds of

$0.9

million, net of commissions and other offering related expenses. As of

February

29,

2019,

we had capacity to issue up to

$7.8

million of common stock under the at-the-market offering program.

During the year ended

December 31, 2018,

the Company issued

6,936,930

shares of common stock under the at-the-market offering program for net proceeds of

$38.9

million, net of commissions and offering related expenses.

Reverse Stock Split.

June 1, 2018,

the Company effected a reverse stock split of the outstanding shares of its common stock by a ratio of

one

-for-

twenty

(the "Reverse Stock Split"), and its common stock began trading on the Nasdaq Capital Market on a Reverse Stock Split-basis on

June 4, 2018.