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whether or not the shares of the series will be redeemable or exchangeable, and, if so, the dates, terms and conditions of redemption or exchange, as the case may be;
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whether the series will have a sinking fund for the redemption or purchase of shares of that series, and, if so, the terms and amount of the sinking fund; and
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the rights of the shares of the series in the event of our voluntary or involuntary liquidation, dissolution or winding up and the relative rights or priority, if any, of payment of shares of the series.
Although we presently have no plans to issue any shares of preferred stock upon completion of the offering, any future issuance of shares of preferred stock, or the issuance of rights to purchase preferred shares, could, among other things, decrease the amount of earnings and assets available for distribution to the holders of common stock or could adversely affect the rights and powers, including voting rights, of the holders of the common stock.
Options
As of July 29, 2019, we had outstanding options to purchase an aggregate 916,208 shares of our common stock, with a weighted-average exercise price of $1.77 per share all of which are issued under the 2014 Plan.
Warrants
On February 19, 2016, we issued a warrant to purchase up to 9,652 shares of our common stock to William C. St. Laurent Descendants Trust at an exercise price of $3.10 per share, which is exercisable until February 19, 2021. In addition, on February 19, 2016, we issued a warrant to purchase up to 9,652 shares of our common stock to Georges C. St. Laurent III Descendants Trust at an exercise price of $3.10 per share, which is exercisable through February 19, 2021
On March 25, 2016, we issued a warrant to purchase up to 1,447 shares of our common stock to Templeside Holdings Ltd. at an exercise price of $3.10 per share, which is exercisable through March 25, 2021. In addition, on March 25, 2016, we issued a warrant to purchase up to 2,895 shares of our common stock to Tara Partners Fund LLC at an exercise price of $3.10 per share, which is exercisable through March 25, 2021.
On September 12, 2016, we issued a warrant to purchase up to 9,652 shares of our common stock to the Georges C. St. Laurent Trust, which is exercisable through September 12, 2021. On September 14, 2016, we issued a warrant to purchase up to 9,652 shares of our common stock to the Georges C. St. Laurent Trust, which is exercisable through September 14, 2021.
On January 27, 2017, we issued a warrant to purchase up to 4,343 shares of our common stock to the Georges C. St. Laurent Trust, which is exercisable through January 27, 2022. On February 22, 2017, we issued a warrant to purchase up to 482 shares of our common stock to the Georges C. St. Laurent Trust, which is exercisable through February 22, 2022. On February 27, 2017, we issued a warrant to purchase up to 4,825 shares of our common stock to the Georges C. St. Laurent Trust, which is exercisable through February 27, 2022. On May 4, 2017, we issued a warrant to purchase up to 3,860 shares of our common stock to William C. St. Laurent, which warrants are exercisable through May 4, 2022. On June 14, 2017, we issued a warrant to purchase up to 1,351 shares of our common stock to William C. St. Laurent, which warrants are exercisable through June 14, 2022. On November 27, 2017, we issued a warrant to purchase up to 1,930 shares of our common stock to the Georges C. St. Laurent Trust, which is exercisable through November 27, 2022, and on December 13, 2017, we issued a warrant to purchase up to 1,930 shares of our common stock to the Georges C. St. Laurent Trust, which is exercisable through December 13, 2022.
From January 9, 2018 to September 19, 2018 we received proceeds aggregating $1,435,000 pursuant to the issuance of convertible promissory notes (the “Notes”), and five-year warrants for the purchase of 27,699 shares of our common stock (the “Warrants”). The Notes bear interest at 10% per annum. On September 30, 2018, the Notes along with all outstanding prior senior convertible notes from the same lender totaling $3,135,000 were exchanged for (i) 1,866,071 shares of Series A-2 Preferred Stock; (ii) a warrant for 486,486 shares of common stock exercisable at $2.16 per share, which is exercisable through