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Shareholders' Equity | 12 Months Ended
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Dec. 31, 2013
Shareholders’ Equity [Abstract] |
Stockholders' Equity Note Disclosure [Text Block] | Stockholders' Equity Reverse Stock Split On June 28, 2013, pursuant to prior shareholder authorization, the Company’s board of directors unanimously approved a 1-for-10 reverse stock split of the Company’s common stock, which the Company effected on July 16, 2013. All share and per share amounts of common stock, options and warrants in the accompanying financial statements have been restated for all periods to give retroactive effect to the reverse stock split. The shares of common stock retained a par value of $0.001 per share. Accordingly, the stockholders’ deficit reflects the reverse stock split by reclassifying from “common stock” to “Additional paid-in capital” an amount equal to the par value of the decreased shares resulting from the reverse stock split. Equity Plans 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. Prior to its expiration, the Company’s 2003 Equity Participation Plan had permitted the grant of share options and shares to the Company's employees, directors, consultants and advisors for up to 250,000 shares of common stock as stock-based compensation. The 2009 Equity Compensation Plan (the “2009 Equity Plan”) makes up to 5,995,000 shares of common stock of the Company (as of December 31, 2013) 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 were granted and the 2009 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, advisor, employee or director of the Company. 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 thereafter by 2,600,000. The Non-U.S. Plan was originally adopted by the stockholders of the Company on October 29, 2009, and was subsequently amended on June 2, 2010 to increase the shares from 470,000 to 870,000, and on October 14, 2011 to decrease the shares to 570,000, prior to the merger into the 2009 Equity Plan. The number of remaining shares authorized to be issued under the various equity plans are as follows:
|  | 2003 Equity Plan |  | 2009 Equity Plan
Shares Authorized for Issuance |  | 250,000 |  |  | 5,995,000 |
Outstanding Stock Options |  | (136,480 | ) |  | (2,795,711 | )
Exercised Stock Options |  | (9,250 | ) |  | (31,869 | )
Restricted stock or equity grants issued under Equity Plans |  | (88,993 | ) |  | (595,852 | )
Shares Expired |  | (15,277 | ) |  | — |
Total common shares remaining to be issued under the Equity Plans |  | — |  |  | 2,571,568 |
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 calender 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, 2013, 23,052 shares were issued under the employee stock purchase plan. At December 31, 2013, the Company had 476,948 shares of the Company's common stock available for future grant in connection with these plans. Equity Issuances In September 2011, the Company entered into a common stock Purchase Agreement (the “Prior Purchase Agreement”) with Aspire Capital Fund, LLC, an Illinois limited liability company (“Aspire Capital”), which provides that, subject to certain terms and conditions, Aspire Capital was committed to purchase up to an aggregate of $20.0 million worth of shares of the Company’s common stock over the 24-month term of the Prior Purchase Agreement. At the Company’s discretion, it may present Aspire Capital with purchase notices under the Prior Purchase Agreement from time to time, to purchase the Company’s common stock, provided certain price and other requirements are met. The purchase price for the shares of stock was based upon one of two formulas set forth in the Prior Purchase Agreement depending on the type of purchase notice we submit to Aspire Capital from time to time, and was be 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 agreement. As consideration for entering into the Prior Purchase Agreement, effective September 30, 2011, we issued 99,010 shares of our common stock to Aspire Capital (the “Commitment Shares”). The issuance of shares of common stock to Aspire Capital pursuant to the Prior Purchase Agreement, including the Commitment Shares, and the sale of those shares from time to time by Aspire Capital to the public, are covered by a shelf registration statement on Form S-3. In August 2012, the Company and Aspire entered into an amendment to the Prior Purchase Agreement dated September 28, 2011, providing for an extension of the 24-month term of the Prior Purchase Agreement until September 30, 2015. Pursuant to the amendment, we agreed to issue to Aspire a five-year warrant to purchase up to 161,290 shares of our common stock at an exercise price of $6.00 per share (the closing price of our common stock on the date the amendment was executed). For the year ended December 31, 2013, the Company issued 1.6 million shares of common stock under the provisions of its equity line of credit with Aspire for gross proceeds of approximately $11.1 million. As of December 31, 2013, the remaining amount available to the Company under the Prior Purchase Agreement was $5.6 million. In April 2013, the Company completed an underwritten offering of 2.0 million shares of the Company's common stock, at a public offering price of $5.00 per share. The underwriters also exercised their entire over-allotment option of 0.3 million shares. The Company received gross proceeds of $11.5 million, before deducting underwriting discounts and commissions and offering expenses payable by the Company. In October 2013, the Company completed an underwritten offering of 5.0 million shares of the Company's common stock, at a public offering price of $7.00 per share. The underwriters also exercised their entire over-allotment option of 0.75 million shares. The Company received gross proceeds of $40.3 million, before deducting underwriting discounts and commissions and offering expenses payable by the Company. Option Exercises During the year ended ended December 31, 2013, option holders exercised an aggregate of 0.03 million options at exercise prices between $4.00 and $5.90 per share for gross proceeds of approximately $0.2 million. Warrant Exercises To raise capital on terms that we deemed favorable, during the year ended December 31, 2013, the Board authorized certain inducements to warrant holders to exercise outstanding common stock purchase warrants significantly before their expiration dates. The Company determined in each instance that such inducements were modifications of equity instruments, and an incremental fair value of the inducement was determined using the Black-Scholes option pricing model. During the year ended ended December 31, 2013, warrant holders exercised an aggregate of 0.6 million warrants at exercise prices between $5.10 and $7.40 per share for gross proceeds of approximately $3.0 million. As an inducement to exercise, we paid certain warrant holders $0.30 per share upon each exercise. Stock Options and Warrants The following table summarizes the activity for stock options and warrants for the years ended December 31, 2013 and December 31, 2012:
| 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, 2012 | 2,168,668 |  |  | $ | 12.85 |  |  | 6.8 |  | $ | 1,658.1 |  |  | 5,528,761 |  |  | $ | 15.65 |  |  | 3.6 |  | $ | 1,300.0 |
Changes during the Year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted | 959,167 |  |  | $ | 7.01 |  |  |  |  |  |  | 86,250 |  |  | $ | 6.66 |  |  |  |  |
Exercised | (31,369 | ) |  | $ | 4.80 |  |  |  |  |  |  | (563,166 | ) |  | $ | 5.38 |  |  |  |  |
Forfeited | (89,412 | ) |  | $ | 5.54 |  |  |  |  |  |  | (17,500 | ) |  | $ | 14.20 |  |  |  |  |
Expired | (74,863 | ) |  | $ | 15.40 |  |  |  |  |  |  | (136,079 | ) |  | $ | 20.15 |  |  |  |  |
Outstanding at December 31, 2013 | 2,932,191 |  |  | $ | 11.19 |  |  | 6.8 |  | $ | 1,658.1 |  |  | 4,898,266 |  |  | $ | 16.50 |  |  | 2.6 |  | $ | 1,811.0 |
Vested at December 31, 2013 or expected to vest in the future | 2,816,138 |  |  | $ | 11.36 |  |  | 6.7 |  | $ | 1,604.0 |  |  | 4,884,957 |  |  | $ | 16.35 |  |  | 2.6 |  | $ | 1,811.0 |
Exercisable at December 31, 2013 | 2,231,869 |  |  | $ | 12.14 |  |  | 6.4 |  | $ | 1,283.3 |  |  | 4,780,658 |  |  | $ | 15.41 |  |  | 2.6 |  | $ | 1,811.0 |
The total intrinsic value of stock options exercised during the years ended December 31, 2013 and December 31, 2012 was $104,360 and $0, respectively. During the year ended December 31, 2013 and 2012, the Company issued warrants for services as follows ($ in thousands, except share data):
|  | Year Ended December 31,
|  | 2013 |  | 2012
Number of Common Stock Purchase Warrants Issued |  | 40,407 |  |  | 41,969 |
Value of Common Stock Purchase Warrants Issued |  | $ | 149.9 |  |  | $ | 172.2 |
Restricted Stock During the year ended December 31, 2013 and 2012, the Company issued restricted stock for services as follows ($ in thousands, except share data):
|  | Year Ended December 31,
|  | 2013 |  | 2012
Number of Restricted Stock Issued |  | 514,700 |  |  | 229,553 |
Value of Restricted Stock Issued |  | $ | 3,360.0 |  |  | $ | 1,325.1 |
The weighted average estimated fair value of restricted stock issued for services in the year ended December 31, 2013 and 2012 was $6.53 and $5.77 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, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Article 4 Reference 2: 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 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section B -Paragraph 7, 11A -Chapter 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: 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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: 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=6228006&loc=d3e74512-122707 Reference 8: 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 9: 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=6959260&loc=d3e187143-122770 Reference 10: 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=6881521&loc=d3e23780-122690 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 3, 4, 5, 6, 7, 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 17: 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 18: 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=6959260&loc=d3e187085-122770 Reference 19: 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 20: 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 21: 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 22: 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 23: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph d -Article 4 + Details
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