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Shareholders' Equity | 12 Months Ended
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Dec. 31, 2015
Shareholders’ Equity [Abstract] |
Stockholders' Equity Note Disclosure [Text Block] | Stockholders' Equity Equity Plans The Company's 2015 Equity Compensation Plan (the "2015 Equity Plan") was adopted by the stockholders of the Company on July 14, 2015, with 4,400,000 shares initially reserved for future awards under the 2015 Equity Plan (as adjusted in the manner described below, the “Share Reserve”). These shares will be available for issuance pursuant non-qualified stock options, incentive stock options , stock appreciation rights, restricted stock, restricted stock units, unrestricted shares, deferred share units, or other kinds of equity based compensation awards. Concurrent with the adoption of the 2015 Equity Plan, no future awards will occur under the 2009 Amended and Restated Equity Compensation Plan (the “2009 Plan”). The 2015 Equity Plan’s initial reserve of shares will automatically increase for 10 years, on each January 1 st beginning with 2016, by a number of shares equal to the lesser of (i) four percent (4%) of the total number of our shares outstanding on December 31 st of the preceding calendar year, (ii) such lesser number as the 2015 Plan’s administrator may earlier designate in writing, and (iii) 176,000 shares, which equals four percent (4%) of the initial reserve of 4,400,000 shares. In addition, the Share Reserve will include shares that are currently subject to awards under our 2009 Equity Plan but that are not issued due to their forfeiture, cancellation, or other settlement. The 2009 Equity Plan was originally adopted by the stockholders of the Company on May 8, 2009. On October 29, 2009, the stockholders of the Company approved an amendment to the 2009 Equity Plan to increase the number of shares of common stock available for issuance thereunder from 380,000 to 975,000. At the 2010 Annual Meeting of Stockholders of the Company held on June 2, 2010, the stockholders approved an amendment to increase this number to 1,375,000. At a Special Meeting of Stockholders of the Company held on January 18, 2011, the stockholders approved an amendment to increase this number to 1,775,000. At the 2011 Annual Meeting of Stockholders of the Company held on October 14, 2011, the stockholders approved an amendment to increase this number to 2,375,000. At the 2012 Annual Meeting of Stockholders of the Company held on October 5, 2012, the stockholders approved an amendment to (i) merge the 570,000 shares reserved for issuance under the Company's 2009 Non-U.S. Based Equity Compensation Plan (the "Non-U.S. Plan") with and into the 2009 Equity Plan, and (ii) increase by 450,000 the aggregate number of shares authorized for issuance under the 2009 Equity Plan (the “2009 Amended & Restated Equity Plan”). At the Company's 2013 Annual Meeting held October 3, 2013, the Company's stockholders approved an amendment to the 2009 Amended & Restated Equity Plan to increase the number of shares authorized for issuance to 5,995,000. At the Company's 2014 Annual Meeting held October 6, 2014, the Company's stockholders approved an amendment to the 2009 Amended & Restated Equity Plan to increase the number of shares authorized for issuance to 8,995,000. The Company's 2003 Equity Participation Plan (the “2003 Equity Plan”) expired in 2013 and accordingly, equity awards under the 2003 Equity Plan can no longer be issued. The Company's 2009 Equity Compensation Plan (the “2009 Equity Plan”) makes up to 8,995,000 shares of common stock of the Company (as of December 31, 2015) available for issuance to employees, consultants, advisors and directors of the Company and its subsidiaries pursuant to incentive or non-statutory stock options, restricted and unrestricted stock awards and stock appreciation rights. All stock options under the 2003 Equity Plan and 2009 Equity Plan were granted and the 2015 Equity Plan are granted at the fair market value of the common stock at the grant date. Stock options vest either on the date of grant, ratably over a period determined at time of grant, or upon the accomplishment of specified business milestones, and generally expire 2, 3, or 10 years from the grant date depending on the status of the recipient as a consultant, employee or director of the Company. The number of remaining shares authorized to be issued under the various equity plans are as follows as of December 31, 2015:
| 2003 Equity Plan |  | 2009 Equity Plan |  | 2015 Equity Plan
Shares Authorized for Issuance | 250,000 |  |  | 8,995,000 |  |  | 4,400,000 |
Outstanding Stock Options | (108,745 | ) |  | (6,113,425 | ) |  | (441,100 | )
Exercised Stock Options | (9,250 | ) |  | (80,856 | ) |  | — |
Restricted stock or equity grants issued under Equity Plans | (88,993 | ) |  | (1,601,033 | ) |  | — |
Shares Expired | (43,012 | ) |  | — |  |  | — |
Total common shares remaining to be issued under the Equity Plans | — |  |  | 1,199,686 |  |  | 3,958,900 |
The Company adopted an employee stock purchase plan effective January 1, 2013, and authorized 500,000 shares under the plan. The plan has two six-month offering periods per year under which eligible employees may contribute up to 15% of their compensation toward the purchase of the Company's common stock per offering period (with a $25,000 cap per calendar year). The employee's purchase price is equal to (i) 85% of the closing price of a share of the Company's common stock on the enrollment date of such offering period or (ii) 85% of the closing price of a share of the Company's Common Stock on the Exercise Date of such Offering Period, whichever is lower. During the year ended December 31, 2015, 133,939 shares were issued under the employee stock purchase plan. At December 31, 2015, the Company had 300,620 shares of the Company's common stock available for future grant in connection with this plan. Equity Issuances June 2015 Public Offering In June 2015, the Company completed an underwritten offering of 12.5 million shares of the Company's common stock, at a public offering price of $2.00 per share. The underwriters also exercised their entire over-allotment option of 1.875 million shares. The Company received gross proceeds of $28.8 million, before deducting underwriting discounts and commissions and offering expenses payable by the Company. Aspire Purchase Agreements In November 2015, the Company entered into a common stock purchase agreement (the "Purchase Agreement") with Aspire Capital Fund, LLC, an Illinois limited liability company (“Aspire Capital”), which provides that, subject to certain terms and conditions and Nasdaq rules, Aspire Capital is committed to purchase up to an aggregate of $30 million of shares (limited to a maximum of approximately 11.0 million shares, unless stockholder approval is obtained or certain minimum sale price levels are reached) of the Company's common stock over a 24-month term. As consideration for entering into the Purchase Agreement, the Company issued 842,696 shares of its common stock to Aspire Capital. During the years ended December 31, 2015, the Company issued 200,000 shares of common stock under the Purchase Agreement with Aspire for gross proceeds of $0.3 million. Under the Purchase Agreement, at the Company’s discretion, it may present Aspire Capital with purchase notices from time to time to purchase the Company’s common stock, provided certain price, trading volume and conditions, including Nasdaq trading requirements, are met. The purchase price for the shares of common stock is based upon one of two formulas set forth in the Purchase Agreement depending on the type of purchase notice the Company submits to Aspire Capital, and is based on market prices of the Company’s common stock (in the case of regular purchases) or a discount of 5% applied to volume weighted average prices (in the case of VWAP purchases), in each case as determined by parameters defined in the Purchase Agreements. We have filed a registration statement with the SEC and a related prospectus supplement that covers the offering of shares of our common stock subject to the Purchase Agreement, and therefore can initiate sales to Aspire at any time. We are party to two existing agreements with Aspire Capital (the "May 2015 Purchase Agreement" and the "March 2014 Purchase Agreement", or collectively, the "Previous Purchase Agreements"). The registration statement we previously filed with the SEC to cover offerings of shares of our common stock subject to the previous Purchase Agreements has expired, and we have not, and currently have no intention to include such shares in a registration statement filed with the SEC. Unless and until we include such shares in a registration statement filed with the SEC, we are unable to initiate sales to Aspire under the Previous Purchase Agreements. Under the May 2015 Purchase Agreement, Aspire Capital is committed to purchase up to an aggregate of $30 million of shares. As consideration for entering into the May 2015 Purchase Agreement, the Company issued 364,837 shares of its common stock to Aspire Capital. The Company has not issued any additional shares under the May 2015 Purchase Agreement. Under the March 2014 Purchase Agreement, Aspire Capital is committed to purchase up to an aggregate of $30 million of shares. As consideration for entering into the March 2014 Purchase Agreement, the Company issued 150,000 shares of its common stock to Aspire Capital. During the years ended December 31, 2015, the Company issued 3.0 million shares of common stock under the March 2014 Purchase Agreement with Aspire for gross proceeds of $9.4 million. Overall, the Company issued 5.1 million shares under the March 2014 Purchase Agreement for gross proceeds of $20.3 million. Stock Options and Warrants The following table summarizes the activity for stock options and warrants for the year ended December 31, 2015:
| Stock Options |  | Warrants
| Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value (In Thousands) |  | Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value (In Thousands)
Outstanding at December 31, 2014 | 4,427,234 |  |  | $ | 9.19 |  |  | 6.93 |  | $ | 28.6 |  |  | 3,550,956 |  |  | $ | 14.12 |  |  | 2.12 |  | $ | 1.0 |
Changes during the Year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted | 3,414,388 |  |  | $ | 3.01 |  |  |  |  |  |  | — |  |  | $ | — |  |  |  |  |
Exercised | — |  |  | $ | — |  |  |  |  |  |  | — |  |  | $ | — |  |  |  |  |
Forfeited | (437,770 | ) |  | $ | 4.92 |  |  |  |  |  |  | — |  |  | $ | — |  |  |  |  |
Expired | (740,372 | ) |  | $ | 7.83 |  |  |  |  |  |  | (336,923 | ) |  | $ | 17.91 |  |  |  |  |
Outstanding at December 31, 2015 | 6,663,480 |  |  | $ | 6.46 |  |  | 6.88 |  | $ | 0.1 |  |  | 3,214,033 |  |  | $ | 13.72 |  |  | 1.26 |  | $ | — |
Vested at December 31, 2015 or expected to vest in the future | 6,663,480 |  |  | $ | 6.58 |  |  | 6.79 |  | $ | 0.1 |  |  | 3,214,033 |  |  | $ | 13.72 |  |  | 1.26 |  | $ | — |
Exercisable at December 31, 2015 | 4,837,711 |  |  | $ | 7.46 |  |  | 6.12 |  | $ | — |  |  | 3,214,033 |  |  | $ | 13.72 |  |  | 1.26 |  | $ | — |
The total intrinsic value of stock options exercised during the years ended December 31, 2015 and December 31, 2014 was $0 and $61,641, respectively. During the years ended December 31, 2015 and 2014, the Company did not issue warrants for services.
Restricted Stock During the years ended December 31, 2015 and 2014, the Company issued restricted stock for services as follows ($ in thousands, except share data):
|  | 2015 |  | 2014 |
Number of Restricted Stock Issued |  | 928,000 |  |  | 917,907 |  |
Value of Restricted Stock Issued |  | $ | 2,488.6 |  |  | $ | 4,996.3 |  |
The weighted average estimated fair value of restricted stock issued for services in the years ended December 31, 2015 and 2014 was $2.68 and $5.44 per share, respectively. The fair value of the restricted stock was determined using the Company’s closing stock price on the date of issuance. The vesting terms of restricted stock issuances are generally within one year.

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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 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 3: 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 4: 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 5: 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 6: 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 7: 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 8: 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 9: 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 Reference 10: 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 11: 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 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 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section C + Details
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