Stockholders' Equity	12 Months Ended
Dec. 31, 2020
Equity [Abstract]
STOCKHOLDERS' EQUITY	NOTE 8 – STOCKHOLDERS' EQUITY *Authorized Common Stock* As of December 31, 2020, the Company has 100,000,000 shares of Common Stock authorized for issuance, $0.001 par value per share, of which 11,211,840 and 2,627,533 shares were issued and outstanding as of December 31, 2020 and 2019, respectively. The holders of the Company's Common Stock are entitled to one vote per share. *Authorized Series 1 Convertible Preferred Stock* In connection with the Preferred Offering (defined below) on September 22, 2020, the Company filed a Certificate of Amendment to the Certificate of Designation of Preferences, Rights and Limitations of Series 1 Convertible Preferred Stock of the Company (the "Amendment") with the State of Delaware to increase the authorized number of shares of the Company's Series 1 Convertible Preferred Stock that may be issued from 3,880 to 8,028. The Amendment was approved by a committee of the Company's Board of Directors and the requisite holders of outstanding shares of Series 1 Convertible Preferred Stock. No approval of the holders of the Company's Common Stock was required to effectuate the Amendment. As of December 31, 2020 and 2019, the Company has 10,000,000 shares of preferred stock authorized for issuance, $0.001 par value per share of which 8,028 shares of Series 1 Convertible Preferred Stock are authorized for issuance and 8,027 and 0 shares were issued and outstanding, respectively. *Description of Series 1 Convertible Preferred Stock* Each share of Series 1 Convertible Preferred Stock is convertible into 1,000 shares of Common Stock, at a conversion price initially equal to approximately $7.01 per common share, subject to adjustment for any stock splits, stock dividends and similar events, at any time at the option of the holder, provided that any conversion of Series 1 Convertible Preferred Stock by a holder into shares of Common Stock would be prohibited if, as a result of such conversion, the holder, together with its affiliates and any other person or entity whose beneficial ownership of the Common Stock would be aggregated with such holder's for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, would beneficially own more than 9.99% of the total number of shares Common Stock issued and outstanding after giving effect to such conversion. Upon written notice to the Company, the holder may from time to time increase or decrease such limitation to any other percentage not in excess of 19.99% specified in such notice. Each share of Series 1 Convertible Preferred Stock is entitled to a preference of $10.00 per share upon liquidation of the Company, and thereafter will share ratably in any distributions or payments on an as-converted basis with the holders of Common Stock. In addition, upon the occurrence of certain transactions that involve the merger or consolidation of the Company, an exchange or tender offer, a sale of all or substantially all of the assets of the Company or a reclassification of its Common Stock, each share of Series 1 Convertible Preferred Stock will be convertible into the kind and amount of securities, cash and/or other property that the holder of a number of shares of Common Stock issuable upon conversion of one share of Series 1 Convertible Preferred Stock would receive in connection with such transaction. The Company's Series 1 Convertible Preferred Stock are non-voting. The terms of the Series 1 Convertible Preferred Stock provide that, in the event of a fundamental transaction (as such term is described in the certificate of designation of preferences, rights and limitations of series 1 convertible non-voting preferred stock), each share of Series 1 Convertible Preferred Stock outstanding shall thereafter be convertible into the kind and amount of securities, cash and/or other property which a holder of the number of shares of Common Stock of the Company issuable upon conversion of one share of Series 1 Convertible Preferred Stock immediately prior to such fundamental transaction would have been entitled to receive pursuant to such fundamental transaction, provided that, if the value of the aggregate of such securities, cash and/or other property the which the holder of one share of Series 1 Convertible Preferred Stock would be entitled to upon conversion thereof would be less than the stated value, then each outstanding share of Series 1 Convertible Preferred Stock shall instead be convertible into such kind of securities, cash and/or other property with an aggregate value equal to the stated value. *Common Stock* On September 23, 2019, the Company completed a placement of 69,114 shares of its common stock at a price of $7.23 per share for gross proceeds of $500. *Underwritten Public Offering* On September 24, 2020, pursuant to an underwriting agreement dated September 22, 2020, the Company issued and sold in an underwritten public offering (the "Common Offering") an aggregate of 4,600,000 shares of its Common Stock at an offering price of $16.87 per share, for gross and net proceeds of approximately $77.6 million and $73.6 million, respectively. The underwriters were granted an option to purchase up to 690,000 additional shares of Common Stock at the public offering price, less the underwriting discount. On October 6, 2020, the underwriters exercised their overallotment option in full, purchasing an additional 690,000 shares, resulting in the receipt of gross and net proceeds of $11.6 million and $11.1 million, respectively. On September 24, 2020, pursuant to an underwriting agreement (dated September 22, 2020), the Company issued and sold in an underwritten public offering (the "Preferred Offering") an aggregate of 4,148 shares of its Series 1 Convertible Preferred Stock at an offering price of $16,873.54 per share, for gross and net proceeds of approximately $70.0 million and $66.3 million, respectively. The Common Offering and the Preferred Offering were made pursuant to the Company's registration statement on Form S-3, declared effective by the Securities and Exchange Commission on May 26, 2020 (Registration No. 333-238273). In December 2020, the Company filed a shelf registration statement on Form S-3, declared effective by the Securities and Exchange Commission on December 18, 2020 (Registration No. 333-251224) (the "Shelf Registration Statement"). The Shelf Registration Statement permits: (i) the offering, issuance and sale by the Company of up to a maximum aggregate offering price of $300 million of common stock, preferred stock, debt securities and warrants in one or more offerings and in any combination. No securities have been sold to date under the Shelf Registration Statement.

Stockholders' Equity

12 Months Ended

Dec. 31, 2020

NOTE 8 – STOCKHOLDERS' EQUITY

Authorized Common Stock

As of December 31, 2020, the Company has 100,000,000 shares of Common Stock authorized for issuance, $0.001 par value per share, of which 11,211,840 and 2,627,533 shares were issued and outstanding as of December 31, 2020 and 2019, respectively.

The holders of the Company's Common Stock are entitled to one vote per share.

Authorized Series 1 Convertible Preferred Stock

In connection with the Preferred Offering (defined below) on September 22, 2020, the Company filed a Certificate of Amendment to the Certificate of Designation of Preferences, Rights and Limitations of Series 1 Convertible Preferred Stock of the Company (the "Amendment") with the State of Delaware to increase the authorized number of shares of the Company's Series 1 Convertible Preferred Stock that may be issued from 3,880 to 8,028. The Amendment was approved by a committee of the Company's Board of Directors and the requisite holders of outstanding shares of Series 1 Convertible Preferred Stock. No approval of the holders of the Company's Common Stock was required to effectuate the Amendment.

As of December 31, 2020 and 2019, the Company has 10,000,000 shares of preferred stock authorized for issuance, $0.001 par value per share of which 8,028 shares of Series 1 Convertible Preferred Stock are authorized for issuance and 8,027 and 0 shares were issued and outstanding, respectively.

Description of Series 1 Convertible Preferred Stock

Each share of Series 1 Convertible Preferred Stock is convertible into 1,000 shares of Common Stock, at a conversion price initially equal to approximately $7.01 per common share, subject to adjustment for any stock splits, stock dividends and similar events, at any time at the option of the holder, provided that any conversion of Series 1 Convertible Preferred Stock by a holder into shares of Common Stock would be prohibited if, as a result of such conversion, the holder, together with its affiliates and any other person or entity whose beneficial ownership of the Common Stock would be aggregated with such holder's for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, would beneficially own more than 9.99% of the total number of shares Common Stock issued and outstanding after giving effect to such conversion. Upon written notice to the Company, the holder may from time to time increase or decrease such limitation to any other percentage not in excess of 19.99% specified in such notice. Each share of Series 1 Convertible Preferred Stock is entitled to a preference of $10.00 per share upon liquidation of the Company, and thereafter will share ratably in any distributions or payments on an as-converted basis with the holders of Common Stock. In addition, upon the occurrence of certain transactions that involve the merger or consolidation of the Company, an exchange or tender offer, a sale of all or substantially all of the assets of the Company or a reclassification of its Common Stock, each share of Series 1 Convertible Preferred Stock will be convertible into the kind and amount of securities, cash and/or other property that the holder of a number of shares of Common Stock issuable upon conversion of one share of Series 1 Convertible Preferred Stock would receive in connection with such transaction. The Company's Series 1 Convertible Preferred Stock are non-voting.

The terms of the Series 1 Convertible Preferred Stock provide that, in the event of a fundamental transaction (as such term is described in the certificate of designation of preferences, rights and limitations of series 1 convertible non-voting preferred stock), each share of Series 1 Convertible Preferred Stock outstanding shall thereafter be convertible into the kind and amount of securities, cash and/or other property which a holder of the number of shares of Common Stock of the Company issuable upon conversion of one share of Series 1 Convertible Preferred Stock immediately prior to such fundamental transaction would have been entitled to receive pursuant to such fundamental transaction, provided that, if the value of the aggregate of such securities, cash and/or other property the which the holder of one share of Series 1 Convertible Preferred Stock would be entitled to upon conversion thereof would be less than the stated value, then each outstanding share of Series 1 Convertible Preferred Stock shall instead be convertible into such kind of securities, cash and/or other property with an aggregate value equal to the stated value.

Common Stock

On September 23, 2019, the Company completed a placement of 69,114 shares of its common stock at a price of $7.23 per share for gross proceeds of $500.

Underwritten Public Offering

On September 24, 2020, pursuant to an underwriting agreement dated September 22, 2020, the Company issued and sold in an underwritten public offering (the "Common Offering") an aggregate of 4,600,000 shares of its Common Stock at an offering price of $16.87 per share, for gross and net proceeds of approximately $77.6 million and $73.6 million, respectively. The underwriters were granted an option to purchase up to 690,000 additional shares of Common Stock at the public offering price, less the underwriting discount. On October 6, 2020, the underwriters exercised their overallotment option in full, purchasing an additional 690,000 shares, resulting in the receipt of gross and net proceeds of $11.6 million and $11.1 million, respectively.

On September 24, 2020, pursuant to an underwriting agreement (dated September 22, 2020), the Company issued and sold in an underwritten public offering (the "Preferred Offering") an aggregate of 4,148 shares of its Series 1 Convertible Preferred Stock at an offering price of $16,873.54 per share, for gross and net proceeds of approximately $70.0 million and $66.3 million, respectively.

The Common Offering and the Preferred Offering were made pursuant to the Company's registration statement on Form S-3, declared effective by the Securities and Exchange Commission on May 26, 2020 (Registration No. 333-238273).

In December 2020, the Company filed a shelf registration statement on Form S-3, declared effective by the Securities and Exchange Commission on December 18, 2020 (Registration No. 333-251224) (the "Shelf Registration Statement"). The Shelf Registration Statement permits: (i) the offering, issuance and sale by the Company of up to a maximum aggregate offering price of $300 million of common stock, preferred stock, debt securities and warrants in one or more offerings and in any combination. No securities have been sold to date under the Shelf Registration Statement.