Redeemable Convertible Preferred Stock	9 Months Ended
Sep. 30, 2017
Redeemable Convertible Preferred Stock [Abstract]
Redeemable Convertible Preferred Stock	6. Redeemable Convertible Preferred Stock On June 13, 2013, the Company’s Board of Directors approved a resolution designating 9,357,935 shares of Preferred Stock as Series B redeemable convertible preferred stock (“Series B”) with an initial stated value of $1.40 and par value of $0.01 per share. The Series B shares were subject to automatic conversion into common stock upon the election of the holders of at least two-thirds of the outstanding Series B shares. Holders of the Series B shares were entitled to receive cumulative, cash dividends at the rate of 10% of the Series B stated value. The Series B shares were redeemable by the Company at any time on or after June 26, 2018, upon the election of the holders of at least two-thirds of the outstanding Series B shares for an amount equal to the original issue price per share plus any accrued and unpaid dividends. On April 8, 2016, certain holders of over two-thirds of the Company’s then-outstanding shares of the Series B shares elected to automatically convert all outstanding shares of Series B into shares of common stock in accordance with the Company’s Amended and Restated Articles of Incorporation (the “Conversion”). The transaction was accounted for based on the difference between the fair value of the consideration transferred to the holders of the preferred stock and the carrying amount of the preferred stock on April 7, 2016. As a result of the Conversion, the 7,527,853 shares of Series B outstanding as of immediately prior to the Conversion were converted into an aggregate of 150,556 shares of common stock. From December 31, 2015 to April 7, 2016, the Company had accreted $1,858,000 from additional paid-in capital to Series B shares to adjust the redemption value of the Series B. The September 30, 2017 consolidated balance sheet reflects dividends payable of $38,000 to former holders of the Series B, which are classified as current liabilities. Common Stock Issuance Agreement On April 8, 2016, the Company entered into the Common Stock Issuance Agreement (“CSIA”) with certain former holders of the Company’s Series B (the “Holders”) pursuant to which the Company agreed to issue a formula-based number of shares of its common stock to the Holders for no additional consideration upon completion of one or more bona fide equity financings in which the Company sells shares of its common stock below a specified price (a “Dilutive Issuance”) in a transaction that occurs prior to the earlier of June 30, 2018 or such time as the Company has raised, following the date of the CSIA, $10.0 million in the aggregate (the “Price Protection Obligations”). In each of June 2016, November 2016 and May 2017, the Company completed offerings of its common stock that constituted Dilutive Issuances under the CSIA. The Company issued 75,020 shares under the Price Protection Obligations subsequent to the June 2016 financing. Due in part to limitations on the number of shares issuable to the Holders under the rules of the NYSE American, no additional shares of common stock were issued to the holders in connection with the November 2016 and May 2017 offerings prior to June 2017 as discussed below. On June 27, 2017, the Company and the Holders entered into the CSIA Amendment to, among other things, terminate the Price Protection Obligations. In consideration for the termination for the Price Protection Obligations and a release of claims by the Holders, the Company agreed to (i) issue to the Holders, within five business days of the Amendment, an aggregate of 28,684 shares of its common stock (the “First Issuance”), which, under the rules of the NYSE American, was the maximum number of shares the Company was permitted to issue to the Holders pursuant to the CSIA without further shareholder approval, and (ii) issue to the Holders in a subsequent closing an aggregate 523,210 shares of common stock (the “Second Issuance”), subject to obtaining shareholder approval of the Second Issuance at the Company’s 2017 Annual Meeting of Shareholders and the Company’s receipt of a release of claims from the Holders at the time of the Second Issuance. In connection with the Second Issuance, the Company recorded a liability of $408,000 as of June 30, 2017 and the related charge was included as a component of general and administrative expense in the Company’s consolidated statements of operations for the second quarter of 2017. The liability was valued based on the closing price of the Company’s common stock of $0.78 per share at June 30, 2017 multiplied by the 523,210 shares of common stock to potentially be issued. On September 7, 2017 the Company’s shareholders approved the Second Issuance. The Company received a release of claims from each of the Holders and issued 523,210 shares of common stock on September 19, 2017. The shares were valued at $519,000 as of September 19, 2017 based on the closing price of the Company’s common stock of $0.99 per share at September 19, 2017 multiplied by the 523,210 shares of common stock issued to the Holders. The related charges of $111,000 and $519,000 were included as a component of general and administrative expense in the Company’s consolidated statements of operations for the three and nine months ended September 30, 2017, respectively.

6. Redeemable Convertible Preferred Stock

On June 13, 2013, the Company’s Board of Directors approved a resolution designating 9,357,935 shares of Preferred Stock as Series B redeemable convertible preferred stock (“Series B”) with an initial stated value of $1.40 and par value of $0.01 per share. The Series B shares were subject to automatic conversion into common stock upon the election of the holders of at least two-thirds of the outstanding Series B shares. Holders of the Series B shares were entitled to receive cumulative, cash dividends at the rate of 10% of the Series B stated value. The Series B shares were redeemable by the Company at any time on or after June 26, 2018, upon the election of the holders of at least two-thirds of the outstanding Series B shares for an amount equal to the original issue price per share plus any accrued and unpaid dividends.

On April 8, 2016, certain holders of over two-thirds of the Company’s then-outstanding shares of the Series B shares elected to automatically convert all outstanding shares of Series B into shares of common stock in accordance with the Company’s Amended and Restated Articles of Incorporation (the “Conversion”). The transaction was accounted for based on the difference between the fair value of the consideration transferred to the holders of the preferred stock and the carrying amount of the preferred stock on April 7, 2016. As a result of the Conversion, the 7,527,853 shares of Series B outstanding as of immediately prior to the Conversion were converted into an aggregate of 150,556 shares of common stock. From December 31, 2015 to April 7, 2016, the Company had accreted $1,858,000 from additional paid-in capital to Series B shares to adjust the redemption value of the Series B. The September 30, 2017 consolidated balance sheet reflects dividends payable of $38,000 to former holders of the Series B, which are classified as current liabilities.

Common Stock Issuance Agreement

On April 8, 2016, the Company entered into the Common Stock Issuance Agreement (“CSIA”) with certain former holders of the Company’s Series B (the “Holders”) pursuant to which the Company agreed to issue a formula-based number of shares of its common stock to the Holders for no additional consideration upon completion of one or more bona fide equity financings in which the Company sells shares of its common stock below a specified price (a “Dilutive Issuance”) in a transaction that occurs prior to the earlier of June 30, 2018 or such time as the Company has raised, following the date of the CSIA, $10.0 million in the aggregate (the “Price Protection Obligations”). In each of June 2016, November 2016 and May 2017, the Company completed offerings of its common stock that constituted Dilutive Issuances under the CSIA. The Company issued 75,020 shares under the Price Protection Obligations subsequent to the June 2016 financing. Due in part to limitations on the number of shares issuable to the Holders under the rules of the NYSE American, no additional shares of common stock were issued to the holders in connection with the November 2016 and May 2017 offerings prior to June 2017 as discussed below.

On June 27, 2017, the Company and the Holders entered into the CSIA Amendment to, among other things, terminate the Price Protection Obligations. In consideration for the termination for the Price Protection Obligations and a release of claims by the Holders, the Company agreed to (i) issue to the Holders, within five business days of the Amendment, an aggregate of 28,684 shares of its common stock (the “First Issuance”), which, under the rules of the NYSE American, was the maximum number of shares the Company was permitted to issue to the Holders pursuant to the CSIA without further shareholder approval, and (ii) issue to the Holders in a subsequent closing an aggregate 523,210 shares of common stock (the “Second Issuance”), subject to obtaining shareholder approval of the Second Issuance at the Company’s 2017 Annual Meeting of Shareholders and the Company’s receipt of a release of claims from the Holders at the time of the Second Issuance. In connection with the Second Issuance, the Company recorded a liability of $408,000 as of June 30, 2017 and the related charge was included as a component of general and administrative expense in the Company’s consolidated statements of operations for the second quarter of 2017. The liability was valued based on the closing price of the Company’s common stock of $0.78 per share at June 30, 2017 multiplied by the 523,210 shares of common stock to potentially be issued. On September 7, 2017 the Company’s shareholders approved the Second Issuance. The Company received a release of claims from each of the Holders and issued 523,210 shares of common stock on September 19, 2017. The shares were valued at $519,000 as of September 19, 2017 based on the closing price of the Company’s common stock of $0.99 per share at September 19, 2017 multiplied by the 523,210 shares of common stock issued to the Holders. The related charges of $111,000 and $519,000 were included as a component of general and administrative expense in the Company’s consolidated statements of operations for the three and nine months ended September 30, 2017, respectively.