COMMON STOCK	3 Months Ended
Mar. 31, 2018
COMMON STOCK.
COMMON STOCK	9.COMMON STOCK The Company has authorized 4,000,000 shares of common stock, $0.00001 par value per share of which 1,562,284, shares were issued and outstanding as of March 31, 2018 and 1,370,992 shares were issued and outstanding as of December 31, 2017. On January 25, 2018, we entered into a purchase and a registration rights agreement with Lincoln Park Capital Fund, LLC (“Lincoln Park”), under which the Company has the right to sell up to $15,000 in shares of our common stock, $0.00001 par value per share, to Lincoln Park over a twenty-four-month period, subject to certain limitations and conditions set forth in the purchase agreement and registration rights agreement. In accordance with the terms of the purchase agreement, at the time we signed the purchase agreement and the registration rights agreement, we issued 17,192 shares to Lincoln Park as consideration for its commitment to purchase shares of the Company’s common stock under the purchase agreement and recorded $530 in deferred offering costs. These costs will be amortized to additional paid-in capital as we draw cash. During the three months ended March 31, 2018, the Company sold an aggregate of 173,474 shares to Lincoln Park, for aggregate proceeds of $2,510 net of issuance costs. During the three months ended March 31, 2018, the Company issued an aggregate of 440 shares of common stock with a fair value of $6 to the Company’s 401(k) plan as a matching contribution. During the three months ended March 31, 2018, the Company issued an aggregate of 188 shares of common stock under the Company’s Employee Stock Purchase Plan (the “ESPP”) and received cash proceeds of approximately $3. During the year ended December 31, 2017, the Company issued an aggregate of 3,576 shares of common stock upon the exercise of stock options and received cash proceeds from such exercises of $26. During the year ended December 31, 2017, the Company issued an aggregate of 139 shares of common stock upon the exercise of warrants and received cash proceeds from such exercises of $3. During the year ended December 31, 2017, the Company issued an aggregate of 3,933 shares of common stock with a fair value of $183 to the Company’s 401(k) plan as a matching contribution. During the year ended December 31, 2017, the Company issued an aggregate of 710 shares of common stock under the Company’s Employee Stock Purchase Plan (the “ESPP”) and received cash proceeds of $51. During the year ended December 31, 2017, the Company issued an aggregate of 80,857 shares of common stock to certain holders of warrants, dated May 9, 2014, in exchange for their warrants to purchase an aggregate of 23,102 shares of common stock. The Company did not receive any cash proceeds from the warrant exchanges.

9.COMMON STOCK

The Company has authorized 4,000,000 shares of common stock, $0.00001 par value per share of which 1,562,284, shares were issued and outstanding as of March 31, 2018 and 1,370,992 shares were issued and outstanding as of December 31, 2017.

On January 25, 2018, we entered into a purchase and a registration rights agreement with Lincoln Park Capital Fund, LLC (“Lincoln Park”), under which the Company has the right to sell up to $15,000 in shares of our common stock, $0.00001 par value per share, to Lincoln Park over a twenty-four-month period, subject to certain limitations and conditions set forth in the purchase agreement and registration rights agreement. In accordance with the terms of the purchase agreement, at the time we signed the purchase agreement and the registration rights agreement, we issued 17,192 shares to Lincoln Park as consideration for its commitment to purchase shares of the Company’s common stock under the purchase agreement and recorded $530 in deferred offering costs. These costs will be amortized to additional paid-in capital as we draw cash. During the three months ended March 31, 2018, the Company sold an aggregate of 173,474 shares to Lincoln Park, for aggregate proceeds of $2,510 net of issuance costs.

During the three months ended March 31, 2018, the Company issued an aggregate of 440 shares of common stock with a fair value of $6 to the Company’s 401(k) plan as a matching contribution.

During the three months ended March 31, 2018, the Company issued an aggregate of 188 shares of common stock under the Company’s Employee Stock Purchase Plan (the “ESPP”) and received cash proceeds of approximately $3.

During the year ended December 31, 2017, the Company issued an aggregate of 3,576 shares of common stock upon the exercise of stock options and received cash proceeds from such exercises of $26.

During the year ended December 31, 2017, the Company issued an aggregate of 139 shares of common stock upon the exercise of warrants and received cash proceeds from such exercises of $3.

During the year ended December 31, 2017, the Company issued an aggregate of 3,933 shares of common stock with a fair value of $183 to the Company’s 401(k) plan as a matching contribution.

During the year ended December 31, 2017, the Company issued an aggregate of 710 shares of common stock under the Company’s Employee Stock Purchase Plan (the “ESPP”) and received cash proceeds of $51.

During the year ended December 31, 2017, the Company issued an aggregate of 80,857 shares of common stock to certain holders of warrants, dated May 9, 2014, in exchange for their warrants to purchase an aggregate of 23,102 shares of common stock. The Company did not receive any cash proceeds from the warrant exchanges.