Note 9 — Warrants

The Company had 1,040,248 warrants outstanding at September 30, 2021 with a weighted average exercise price of $3.92 per share, down from 2,273,369 warrants outstanding at December 31, 2020 due to the exercise of 1,233,121 warrants in the three months ended March 31, 2021. No warrants were exercised subsequent to March 31, 2021 and through September 30, 2021.

At September 30, 2021, all warrants are exercisable, although the warrants held by certain of the Company’s warrant holders may be exercised only to the extent that the total number of shares of common stock then beneficially owned by such warrant holder does not exceed 4.99% (or, at the investor’s election, 9.99%) of the outstanding shares of the Company’s common stock.

Early Warrant Exercise Transaction

In July 2020, the Company entered into letter agreements with certain of the Company’s Series A warrant holders (the “Series A Warrant Holders”), who were previously issued warrants (the “Original Warrants”) to purchase shares of common stock of the Company. The Series A Warrant Holders agreed to the early exercise of Series A warrants pursuant to the letter agreements (the “Early Warrant Exercise Transaction”). The transaction closed in August 2020. The Company raised net proceeds of $2.5 million in the Early Warrant Exercise Transaction.

Pursuant to the letter agreements and in consideration of the Series A Warrant Holders exercising Series A warrants to purchase an aggregate of 1,176,137 shares of common stock, the Company issued to the Series A Warrant Holders new Series C warrants to purchase up to an aggregate of 705,688 shares of common stock with an exercise price of $8.90 per share and an expiration date of August 4, 2025. The estimated fair value of the Series C warrants, calculated using the Black-Scholes model, was $3.7 million on the date of issuance and was recognized as a non-cash warrant inducement expense within other income (expenses) in the statement of operations. The assumptions used in the Black Scholes model included a risk-free interest rate of 0.22%, a zero expected dividend yield, an expected life of 5 years and an expected volatility of 90%.

To the extent that a Series A Warrant Holder’s exercise of Original Warrants would result in such holder exceeding beneficial ownership of 9.99% of the outstanding common stock of the Company, such excess warrant shares will be held in abeyance for the benefit of such Series A Warrant Holder until such time as its right thereto would not result in the holder exceeding this limitation. The term of the abeyance shall extend no later than May 12, 2025.