On October 4, 2019, the Company entered into an At Market Issuance Sales Agreement (the “Sales Agreement”) with B. Riley FBR, Inc. (the “Sales Agent”) to create an at-the-market equity program under which the Company was entitled, from time to time, to offer and sell up to 38.0 million shares of its common stock through the Sales Agent. However, to ensure that the Company had sufficient shares available for reservation and issuance upon exercise of all of the warrants to be issued to the lenders under the Orion Facility (as discussed in further detail below), the Company, effective as of October 31, 2019, reduced the number of shares reserved for future issuance and sale under the Sales Agreement from 27.9 million shares to 7.9 million shares (thus allowing for total aggregate issuances (past and future) of up to 18.0 million shares under the Sales Agreement) and reserved 20.0 million shares for issuance upon exercise of the warrants by the Orion lenders. Under the Sales Agreement, the Sales Agent was entitled to a commission in an amount equal to 3.0% of the gross proceeds from each sale of shares under the Sales Agreement.

There were no sales under the Sales Agreement during the three months ended April 30, 2020. During the six months ended April 30, 2020, the Company issued and sold a total of approximately 7.9 million shares of its common stock under the Sales Agreement at prevailing market prices, with an average sale price of $0.46 per share, and raised aggregate gross proceeds of approximately $3.6 million, before deducting expenses and commissions. Commissions of $0.1 million were paid to the Sales Agent in connection with these sales, resulting in net proceeds to the Company of approximately $3.5 million. As of April 30, 2020, there were 1,154 shares available for issuance under the Sales Agreement.

See Note 18. “Subsequent Events” for information regarding the termination of the Sales Agreement following the end of the quarter.

In connection with the closing of the Orion Facility and the Initial Funding, on October 31, 2019, the Company issued warrants to the lenders under the Orion Facility to purchase up to a total of 6,000,000 shares of the Company’s common stock, at an exercise price of $0.310 per share (the “Initial Funding Warrants”). In addition, pursuant to the Orion Facility, on the date of the Second Funding (November 22, 2019), the Company issued warrants to the lenders under the Orion Facility to purchase up to a total of 14,000,000 shares of the Company’s common stock, with an exercise price with respect to 8,000,000 of such shares of $0.242 per share and with an exercise price with respect to 6,000,000 of such shares of $0.620 per share (the “Second Funding Warrants”, and together with the Initial Funding Warrants, the “Orion Warrants”).

The Orion Warrants have an 8-year term from the date of issuance, are exercisable immediately beginning on the date of issuance, and include provisions permitting cashless exercises.

On January 9, 2020, the lenders exercised, on a cashless basis, Orion Warrants (with cash exercise prices of $0.310 per share and $0.62 per share) representing the right to purchase, in the aggregate, 12,000,000 shares of the Company’s common stock. Because these warrants were exercised on a cashless basis pursuant to the formula set forth in the warrants, the lenders received, in the aggregate 9,396,320 shares of the Company’s common stock upon the cashless exercise of Initial Funding Warrants representing the right to purchase 6,000,000 shares of the Company’s common stock and Second Funding Warrants representing the right to purchase 6,000,000 shares of the Company’s common stock. The cashless exercise resulted in 2,603,680 shares no longer being required to be reserved for issuance upon exercise of the Orion Warrants. Following this exercise, warrants to purchase 8,000,000 shares of the Company’s common stock, with an exercise price of $0.242 per share, remain outstanding.

The estimated fair value of the Orion Warrants upon issuance was based on a Black-Scholes model using Level 2 inputs, including volatility of 96%, a risk free rate of 1.63%, the Company’s common stock price as of October 31, 2019 of $0.24 per share and the term of 8 years, which resulted in a total value of $3.9 million. The Orion Warrants will be remeasured to fair value each reporting period.

The Orion Warrants that were converted were remeasured to fair value immediately preceding the conversion based upon volatility of 103.7%, a risk free rate of 1.81% and the Company’s common stock price of $2.29 on January 8, 2020, which resulted in a $23.7 million charge for the three months ended January 31, 2020. The revised estimated fair value of the converted warrants as of the date of conversion of $26.0 million was reclassified to Additional paid in capital. The remaining warrants as of January 31, 2020 were remeasured to estimated fair value based upon a volatility of 104.9%, a risk free rate of 1.45% and the Company’s common stock price at January 31, 2020 of $1.59 per share, which resulted in a charge for the three months ended January 31, 2020 of $10.5 million. The Company remeasured the remaining warrants again at April 30, 2020 based upon a volatility of 107.4%, a risk free rate of 0.57% and the Company’s common stock price at April 30, 2020 of $2.02 per share, which resulted in a charge for the three months ended April 30, 2020 of $3.4 million. The remaining warrants outstanding are valued at $15.5 million as of April 30, 2020 and are classified as Long-term debt and other liabilities.

On May 3, 2017, the Company completed an underwritten public offering of (i) 1,000,000 shares of its common stock, (ii) Series C warrants to purchase 1,000,000 shares of its common stock and (iii) Series D warrants to purchase 1,000,000 shares of its common stock. The Series C warrants have an exercise price of $19.20 per share and a term of five years. The Series D warrants were exercised previously and are no longer outstanding. No Series C warrants were exercised during the three and six months ended April 30, 2020.

The following table summarizes outstanding warrant activity during the six months ended April 30, 2020:

	Series C Warrants		Orion Warrants
Balance as of October 31, 2019		964,114		6,000,000
Warrants issued		—		14,000,000
Warrants converted		—		(12,000,000	)
Balance as of April 30, 2020		964,114		8,000,000