14.	Stockholders’ Equity

Public Offerings – In June 2017, the Company issued 75,000 shares of its common stock at $100.00 per share through the Public Offering. The Company incurred $1,388,615 in issuance costs from the Public Offering and issued 3,750 warrants valued at $55,475 to the underwriters (as discussed in Note 15).

In July 2017, as permitted by the underwriting agreement entered into in connection with the Public Offering, the underwriters exercised their option to purchase an additional 11,250 shares of common stock at $100.00 per share. The Company incurred $176,771 in issuance costs from this issuance. In connection with this exercise, certain affiliates of the underwriters were granted additional warrants to purchase 563 shares of common stock in the aggregate valued at $8,321 (as discussed in Note 15).

In connection with and prior to the Public Offering, the Company issued 90,084 shares of its common stock upon conversion of all outstanding preferred stock and 25,833 shares of its common stock upon conversion of the previously outstanding convertible debentures.

In December 2019, the Company completed a public offering of its common stock (the “Public Offering”). In connection with the Public Offering, the Company sold 857,500 shares of common stock at a public offering price of $3.00 per share, resulting in aggregate net proceeds of $2,117,948 after deducting underwriting discounts and commissions and other expenses related to the offering. The Company incurred $454,552 in issuance costs from the Public Offering and no warrants to purchase were issued to the underwriters.

In April 2020, the Company also completed a public offering of its common stock (the "April Public Offering"). In connection with the April Public Offering, the Company sold 440,000 shares of common stock at a public offering price of $4.25 per share, resulting in aggregate net proceeds of approximately $1,522,339 after deducting underwriting discounts and commissions and other expenses related to the offering. The Company incurred a total of approximately $347,661 in issuance costs in connection with the offering and no warrants to purchase were issued to the underwriters.

In May 2020, the Company completed a public offering of its common stock (the "May Public Offering"). In connection with the May Public Offering, the Company sold 6,000,000 shares of common stock at a public offering price of $2.50 per share. Pursuant to the terms of the related Underwriting Agreement dated May 6, 2020 by and among the Company and ThinkEquity, a division of Fordham Financial Management, Inc., as representatives of several underwriters named therein ("ThinkEquity"), ThinkEquity was granted an over-allotment option to purchase up to an additional 900,000 shares of the Company's common stock, par value $0.01 per share (the "Common Stock"), in connection with the previously announced public offering. On May 15, 2020, ThinkEquity exercised in full such option with respect to all 900,000 shares of the Company's Common Stock (the "Option Shares"). After giving effect to the full exercise of the over-allotment option, the total number of shares of Common Stock sold by the Company in the May Public Offering was 6,900,000 shares of Common Stock and total net proceeds to the Company, after deducting underwriting discounts and commissions and other offering expenses payable by the Company, were approximately $15,596,141. The Company incurred a total of approximately $1,653,859 in issuance costs in connection with the offering and issued warrants to purchase 300,000 shares of common stock to the underwriters.

Securities Purchase Agreement – In April 2019, the Company issued 42,388 shares of its common stock at $22.00 per share through a Securities Purchase Agreement (the “Purchase Agreement”) with certain institutional investors and accredited investors. Concurrently with the sale of the common stock, pursuant to the Purchase Agreement, the Company also sold common stock purchase warrants to such investors to purchase up to an aggregate of 42,388 shares of common stock. The Company incurred $379,816 in issuance costs from the offering and issued 4,239 warrants to the underwriters. The warrants are further discussed in Note 13.

Decrease in Authorized Shares – On June 5, 2019, at the Company’s annual meeting of stockholders, the stockholders approved an amendment to the Company’s amended and restated certificate of incorporation to decrease the number of authorized shares of common stock from 300,000,000 to 25,000,000 shares. Following the meeting, on June 5, 2019, the Company filed a certificate of amendment to the amended and restated certificate of incorporation to decrease its authorized shares of common stock accordingly. There was no change to the number of authorized shares of preferred stock.

Underwriting Agreement – In August 2019, the Company issued 45,000 shares of its common stock at $17.00 per share pursuant to the terms of an Underwriting Agreement (the “Underwriting Agreement”) to the public. The Company incurred $181,695 in issuance costs from the offering and issued warrants to purchase 2,250 shares of common stock to the underwriter. The warrants are further discussed in Note 15.