Note 10 - Equity Incentive Plans	3 Months Ended
Mar. 31, 2020
Notes to Financial Statements
Stock Incentive Plans Disclosure [Text Block]	10 . Equity Incentive Plans 2010 Stock Incentive Plan . In February 2011, the Company’s stockholders approved the Gevo, Inc. 2010 Stock Incentive Plan (as amended and restated to date, the "2010 Plan"). The 2010 Plan provided for the grant of non-qualified stock options, incentive stock options, stock appreciation rights, restricted stock awards, restricted stock units and other equity awards to employees and directors of the Company. On June 10, 2019, the 2010 Plan was amended and restated, which increased the number of shares of common stock reserved for issuance to 3,266,661 shares. In February 2020, the Company issued 109,337 shares of restricted common stock, vesting over three years, and 1,258 shares of restricted common stock, vesting over two years, to certain of its employees in relation to restricted stock awards granted on February 27, 2020. In April 2020, the Company also issued 239,155 shares of restricted common stock in relation to restricted stock awards granted to its employees on April 1, 2020 in connection with the 20% salary reduction discussed in Footnote 1, vesting on May 15, 2020. In March 2020, the Company withheld 4,055 shares of common stock to settle income taxes related to the vested restricted stock awards for certain employees. At March 31, 2020, an additional 1,679,947 shares were available for issuance upon the exercise of outstanding stock option awards or the grant of stock appreciation rights and restricted stock awards under the 2010 Plan. Employee Stock Purchase Plan . In February 2011, the Company’s stockholders approved the Employee Stock Purchase Plan (the "ESPP"). The offering periods for the ESPP are from January 1 to June 30 and from July 1 to December 31 of each calendar year. The Company has reserved 190 shares of common stock for issuance under the ESPP, of which 190 shares as of March 31, 2020 are available for future issuance. The purchase price of the common stock under the ESPP is 85% of the lower of the fair market value of a share of common stock on the first or last day of the purchase period. There were no purchases of common stock under the ESPP during the three months ended March 31, 2020 or 2019.

. Equity Incentive Plans

2010

Stock Incentive Plan

. In

February 2011,

the Company’s stockholders approved the Gevo, Inc.

2010

Stock Incentive Plan (as amended and restated to date, the

"2010

Plan"). The

2010

Plan provided for the grant of non-qualified stock options, incentive stock options, stock appreciation rights, restricted stock awards, restricted stock units and other equity awards to employees and directors of the Company. On

June 10, 2019,

the

2010

Plan was amended and restated, which increased the number of shares of common stock reserved for issuance to

3,266,661

shares. In

February 2020,

the Company issued

109,337

shares of restricted common stock, vesting over

three

years, and

1,258

shares of restricted common stock, vesting over

two

years, to certain of its employees in relation to restricted stock awards granted on

February 27, 2020.

April 2020,

the Company also issued

239,155

shares of restricted common stock in relation to restricted stock awards granted to its employees on

April 1, 2020

in connection with the

20%

salary reduction discussed in Footnote

vesting on

May 15, 2020.

March 2020,

the Company withheld

4,055

shares of common stock to settle income taxes related to the vested restricted stock awards for certain employees. At

March 31, 2020,

an additional

1,679,947

shares were available for issuance upon the exercise of outstanding stock option awards or the grant of stock appreciation rights and restricted stock awards under the

2010

Plan.

Employee Stock Purchase Plan

. In

February 2011,

the Company’s stockholders approved the Employee Stock Purchase Plan (the "ESPP"). The offering periods for the ESPP are from

January 1

June 30

and from

July 1

December 31

of each calendar year. The Company has reserved

190

shares of common stock for issuance under the ESPP, of which

190

shares as of

March 31, 2020

are available for future issuance. The purchase price of the common stock under the ESPP is

85%

of the lower of the fair market value of a share of common stock on the

first

or last day of the purchase period. There were

purchases of common stock under the ESPP during the

three

months ended

March 31, 2020

2019.