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Common stock - Note 8 | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Common stock - Note 8 | 8. COMMON STOCK In August 2017, we raised approximately $11.5 million before issuance costs of approximately $1.1 million through an underwritten public offering of 5.5 million shares of our common stock. In August 2017, we raised approximately $3.2 million before issuance costs of approximately $26,000 through a private placement of 1.5 million shares of our common stock. During the second quarter of 2017, we received $906,000 from the exercise of warrants to purchase 460,000 shares of common stock, which warrants were issued in connection with earlier financing transactions. In May 2017, we entered into an ATM agreement with IFS Securities (DBA Brinson Patrick). During the second quarter of 2017, we received gross proceeds of $3.7 million before issuance costs of approximately $125,000 from the sale of approximately 1.7 million shares of our common stock. The agreement was terminated in June 2017 at our election without penalty. During the second quarter of 2017, we received proceeds of $2.2 million from the sale of 1.2 million shares of our common stock as part of the Common Stock Purchase agreement we entered into with Lincoln Park in September 2016. Under the terms of the agreement, in September 2016, Lincoln Park made an initial purchase of $2.0 million in shares of common stock at a purchase price of $1.50 per share. The agreement was terminated in August 2017 at our election without penalty. In December 2016, we raised approximately $2.1 million before issuance costs of approximately $18,000 through a registered direct offering of 2.0 million shares of our common stock. In December 2016, we raised approximately $13.0 million before issuance costs of approximately $1.2 million through an underwritten public offering of approximately 12.1 million shares of our common stock. In March 2016, we raised approximately $6.9 million before issuance costs of approximately $650,000 through an underwritten public offering of approximately 4.1 million shares of our common stock. In May 2015, we entered into an ATM agreement with Meyers Associates, L.P. Under the terms of the agreement, we may, from time to time, at our discretion, offer and sell shares of our common stock having an aggregate value of up to $6.0 million. As of December 31, 2016, we have received gross proceeds of approximately $3.1 million before issuance costs of approximately $109,000 from the sale of 1.2 million shares of our common stock. There were no sales under this agreement in 2017. The agreement was terminated in May 2017 in accordance with its terms without penalty. During the year ended December 31, 2015, we received approximately $3.3 million from the exercise of warrants to purchase 1.5 million shares of our common stock, which warrants were issued in connection with earlier financing transactions. During the three months ended March 31, 2015, we received gross proceeds of approximately $1.0 million as part of an ATM agreement we entered into with Meyers Associates, L.P. in June 2014. We have completed sales under this agreement, having received total proceeds of approximately $4.5 million before issuance costs of approximately $206,000 from the sale of 2.0 million shares of our common stock.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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