common stock during 2019; and $1.4 million from the sale of 1,040,654 shares of common stock during the nine months ended September 30, 2020. There were no sales of common stock under the LP Purchase Agreement during the three months ended September 30, 2020. As of April 6, 2020, all registered shares relating to the LP Purchase Agreement had been sold and/or issued to Lincoln Park. The LP Purchase Agreement terminated during our second fiscal quarter of 2020. Effective April 13, 2020, the Company became eligible to sell additional shares to Lincoln Park pursuant to the LP 2020 Purchase Agreement, as discussed below.
LP 2020 Purchase Agreement
On March 26, 2020, the Company entered into a purchase agreement (the “LP 2020 Purchase Agreement”) and a registration rights agreement (the “LP 2020 Registration Rights Agreement”) with Lincoln Park pursuant to which Lincoln Park has agreed to purchase from us, from time to time, up to $10,000,000 of our common stock, subject to certain limitations, during the 24 month term of the LP 2020 Purchase Agreement. Pursuant to the terms of the LP 2020 Purchase Agreement, on the agreement date, the Company issued 250,000 shares of its common stock to Lincoln Park as consideration for its commitment to purchase shares of common stock of the Company under the LP Purchase Agreement (the “LP 2020 Commitment Shares”). Pursuant to the terms of the LP 2020 Registration Rights Agreement, on March 27, 2020, as amended on April 8, 2020, the Company filed with the SEC a registration statement on Form S-1 to register for resale under the Securities Act of 1933, as amended, or the Securities Act, 1,770,000 shares of common stock, which includes the LP 2020 Commitment Shares, that have been or may be issued to Lincoln Park under the LP 2020 Purchase Agreement. The Form S-1 was declared effective by the SEC on April 13, 2020. As of June 22, 2020, all shares registered under this S-1 had been sold and/or issued to Lincoln Park. On June 26, 2020, the Company filed with the SEC a registration statement on Form S-1 to register for resale under the Securities Act of 1933, as amended, or the Securities Act, an additional 4,500,000 shares of common stock that have been or may be issued to Lincoln Park under the LP Purchase Agreement. The Form S-1 was amended twice on July 7, 2020 and declared effective by the SEC on July 7, 2020. For the three and nine months ended September 30, 2020, 2,060,000 shares, respectively, registered under this S-1 had been sold and/or issued to Lincoln Park.
Under the LP 2020 Purchase Agreement, on any business day selected by us, we may direct Lincoln Park to purchase up to 50,000 shares of our common stock on any such business day, which we refer to as a Regular Purchase in the LP 2020 Purchase Agreement, provided, however, that (i) the Regular Purchase may be increased to up to 80,000 shares, provided that the closing sale price is not below $1.00 on the purchase date and (ii) the Regular Purchase may be increased to up to 100,000 shares, provided that the closing sale price is not below $1.50 on the purchase date. In each case, the maximum amount of any single Regular Purchase may not exceed $1,000,000 per purchase. Lincoln Park has no right to require the Company to sell any shares of common stock to Lincoln Park, but Lincoln Park is obligated to make purchases as we direct, subject to certain conditions. The purchase price for Regular Purchases shall be equal to the lesser of: (i) the lowest sale price of the common shares during the purchase date, or (ii) the average of the three (3) lowest closing sale prices of the common shares during the ten (10) business days prior to the purchase date.
Under applicable rules of The Nasdaq Capital Market, in no event may we issue or sell to Lincoln Park under the LP 2020 Purchase Agreement more than 19.99% of the shares of our common stock outstanding immediately prior to the execution of the LP 2020 Purchase Agreement (which is 1,774,024 shares, based on 8,870,129 shares outstanding immediately prior to the execution of the LP 2020 Purchase Agreement), which limitation we refer to as the Exchange Cap, unless (i) we obtain stockholder approval to issue shares of common stock in excess of the Exchange Cap or (ii) the average price of all applicable sales of our common stock to Lincoln Park under the LP 2020 Purchase Agreement equals or exceeds $0.7306 (which represents the closing consolidated bid price of our common stock on March 25, 2020, plus an incremental amount to account for our issuance of the Commitment Shares to Lincoln Park), such that the transactions contemplated by the LP 2020 Purchase Agreement are exempt from the Exchange Cap limitation under applicable Nasdaq rules. In any event, the LP 2020 Purchase Agreement specifically provides that we may not issue or sell any shares of our common stock under the LP 2020 Purchase Agreement if such issuance or sale would breach any applicable rules or regulations of The Nasdaq Capital Market.
The LP 2020 Purchase Agreement also prohibits us from directing Lincoln Park to purchase any shares of common stock if those shares, when aggregated with all other shares of our common stock then beneficially owned by Lincoln Park and its affiliates, would result in Lincoln Park and its affiliates having beneficial ownership, at any single