Note 8 — Equity Incentive Plan

In May 2013, the Company adopted the 2013 Equity Incentive Plan (the “Plan”) and reserved shares of common stock for issuance under the Plan, which was amended effective June 16, 2021. As a result of the amendment, the number of shares authorized for issuance under the Plan increased by 500,000 shares and the Plan will now terminate on June 16, 2031, unless sooner terminated or extended by the Board. The Plan is administered by the Compensation Committee of the Company’s Board of Directors.At September 30, 2021, 567,140 shares of common stock were available for issuance under the Plan.

A summary of the Company’s stock option activity and related information is as follows:

​

​

During the nine months ended September 30, 2021, the Company granted 31,821 stock options to Board members and 50,000 stock options to employees under the Plan. The estimated fair value of these stock options, calculated using the Black-Scholes option valuation model, was $691,728, $228,837 of which was recognized during the nine months ended September 30, 2021.

At September 30, 2021, there was $491,588 of unrecognized compensation cost related to non-vested equity awards granted under the Plan. That cost is expected to be recognized over a weighted average period of 1.1 years.