Note 13. Equity-classified Warrants

On August 4, 2020, the Company issued a warrant to an underwriter (the “Underwriter Warrant”) to purchase 240,100 shares of common stock. The Underwriter Warrant is exercisable at a per share exercise price of $11.00, and is exercisable at any time from and after January 31, 2021 through August 4, 2025.

Upon the issuance of the Underwriter Warrant as partial compensation for its services as an underwriter, the fair value of approximately $677,082 was recorded as equity issuance costs.

The assumptions in the table below were used to estimate the fair value of the Underwriter Warrant granted using the Black-Scholes option pricing method at August 4, 2020. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. The expected term of the Underwriter Warrant issued represents the period of time that the Underwriter Warrant issued are expected to be outstanding. Expected volatility is based on implied volatilities based on an analysis of historical volatilities of selected guideline public companies and other factors.

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The details of the outstanding the Underwriter Warrant is as follows:

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During the year ended December 31, 2021, no portion of the Underwriter Warrant was issued, exercised, or expired.