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Stockholders' Equity | 12 Months Ended
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Dec. 31, 2014
Stockholders' Equity [Abstract] |
Stockholders Equity Note Disclosure [Text Block] |
11. | Stockholders’ Equity
Preferred Stock The Company’s Certificate of Incorporation authorizes the Company to issue up to 10,000,000 shares of preferred stock, $0.001 par value per share. Under the terms of the Company’s Certificate of Incorporation, the board of directors is authorized, subject to any limitations prescribed by law, without stockholder approval, to issue such shares of preferred stock in one or more series. Each such series of preferred stock shall have such rights, preferences, privileges and restrictions, including voting rights, dividend rights, conversion rights, redemption privileges and liquidation preferences, as shall be determined by the board of directors. In November 2004, the Company filed a certificate of designation designating 2,045,714 shares of the Company’s preferred stock as shares of Series A Convertible Preferred Stock, which shares were later issued. All of the shares of Series A Convertible Preferred Stock that was issued has been converted into common stock and may not be reissued. Accordingly, as of December 31, 2014, there were 7,945,286 undesignated shares of preferred stock remaining available for issuance. There were no issuances of preferred stock during the year ended December 31, 2014. Common Stock The Company is authorized to issue 110,000,000 shares of common stock, $.001 par value per share. As of December 31, 2014, there were 81,656,763 shares of common stock outstanding. Common Stock Issuances - Public Offerings On February 26, 2014, the Company entered into an underwriting agreement with B. Riley & Co., LLC (the “Underwriter”) relating to an underwritten public offering of 7,876,497 shares of the Company’s common stock, par value $0.001 per share. On February 27, 2014, the Company received notice from the Underwriter that it had fully-exercised its over-allotment option to purchase an additional 1,181,475 shares of common stock. On March 3, 2014, the Company completed the public offering of 9,057,972 shares of its common stock at a purchase price of $1.38 per share, which includes the full exercise of the over-allotment option granted to the underwriters. The gross proceeds to the Company from this offering were approximately $12.5 million, before deducting underwriting discounts and other estimated offering expenses incurred by the Underwriter. The Company received net proceeds of approximately $11.7 million before paying offering expenses of approximately $0.3 million incurred by the Company to complete the public offering. On October 23, 2014, the Company entered into an underwriting agreement with B. Riley & Co., LLC (the “Underwriter”) and Craig-Hallum (“Co-Manager”) relating to an underwritten public offering of 6,896,552 shares of the Company’s common stock, par value $0.001 per share. On October 28, 2014, the Company completed the public offering of 6,896,552 shares of its common stock at a purchase price of $1.45 per share, which excludes the full exercise of the over-allotment option granted to the underwriters. On October 29, 2014, the Company received notice from the Underwriter that it had fully-exercised its over-allotment option to purchase an additional 1,034,483 shares of common stock. The gross proceeds to the Company from this offering were approximately $11.5 million, before deducting underwriting discounts and other estimated offering expenses incurred by the Underwriter. The Company received net proceeds of approximately $10.8 million before paying estimated offering expenses of approximately $0.2 million incurred by the Company to complete the public offering. Common Stock Issuances - Employee Stock Option Exercises Shares of common stock issued as a result of stock option exercises for the years ended December 31, 2014, 2013 and 2012 were 760,399, 155,500 and 525,000, respectively. The Company realized gross proceeds of approximately $462,200, $46,200 and $51,200 from the exercise of stock options for the years ended December 31, 2014, 2013 and 2012, respectively. See Note 12 for additional information regarding stock option plans.

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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 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d),(e)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section C Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Article 4 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Preferred Stock -URI http://asc.fasb.org/extlink&oid=6521494 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 Reference 17: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 18: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph d -Article 4 Reference 19: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 + Details
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