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6. STOCK-BASED COMPENSATION | 6 Months Ended
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Jun. 30, 2013
Share-based Compensation [Abstract] |
Stock-Based Compensation | Options and Warrants We have two long-term incentive plans which we refer to as the 2000 Plan and the 2006 Plan. The 2000 Plan was terminated as to future grants when the 2006 Plan was approved by the stockholders in 2006. As of June 30, 2013, we have reserved for issuance under the 2006 Plan 11,000,000 shares of common stock. Certain options granted under the 2006 Plan to employees are intended to qualify as incentive stock options under existing tax regulations. In addition, we may issue non-qualified stock options and warrants under the 2006 Plan from time to time to non-employees, in connection with acquisitions and for other purposes and we may also issue restricted stock under the 2006 Plan. Stock options and warrants generally vest over two to five years and expire five to ten years from date of grant. As of June 30, 2013, 4,916,250, or approximately 89.3%, of the 5,506,250 outstanding stock options and warrants granted under our option plans are fully vested. During the six months ended June 30, 2013, we did not grant options or warrants under the 2006 Plan. We have issued warrants outside the 2006 Plan under various types of arrangements to employees, and in exchange for outside services. All warrants issued to employees or consultants after our February 2007 listing on the NASDAQ Global Market have been characterized as awards under the 2006 Plan. All warrants outside the 2006 Plan have been issued with an exercise price equal to the fair value of the underlying common stock on the date of grant. The warrants expire from five to seven years from the date of grant. Vesting terms are determined by the board of directors or the compensation committee of the board of directors at the date of grant. As of June 30, 2013, 330,000, or 100%, of all the outstanding warrants outside the 2006 Plan are fully vested. During the six months ended June 30, 2013, we did not grant warrants outside of our 2006 Plan. The following summarizes all of our option and warrant transactions for the six months ended June 30, 2013:
Outstanding Options and Warrants Under the 2006 Plan and 2000 Plan |  | Shares |  |  | Weighted Average Exercise Price Per Common Share |  | Weighted Average Remaining Contractual Life (in years) |  | Aggregate Intrinsic Value |
Balance, December 31, 2012 |  |  | 6,231,250 |  |  | $3.58 |  |  |  |  |  |
Granted |  |  | – |  |  | - |  |  |  |  |  |
Exercised |  |  | – |  |  | - |  |  |  |  |  |
Canceled or expired |  |  | (725,000 | ) |  | 6.82 |  |  |  |  |  |
Balance, June 30, 2013 |  |  | 5,506,250 |  |  | 3.16 |  | 1.61 |  | $ | 960,013 |
Exercisable at June 30, 2013 |  |  | 4,916,250 |  |  | 3.19 |  | 1.48 |  |  | 894,879 |
|  |  |  |  | Weighted Average Exercise Price Per |  | Weighted Average Remaining Contractual Life |  | Aggregate Intrinsic |
Non-Plan Outstanding Warrants |  | Shares |  |  | Common Share |  | (in years) |  | Value |
Balance, December 31, 2012 |  |  | 1,502,898 |  |  | $1.50 |  |  |  |  |  |
Granted |  |  | – |  |  | - |  |  |  |  |  |
Exercised |  |  | (1,172,898 | ) |  | 1.12 |  |  |  |  |  |
Canceled or expired |  |  | – |  |  | - |  |  |  |  |  |
Balance, June 30, 2013 |  |  | 330,000 |  |  | 2.87 |  | 1.60 |  | $ | 6,000 |
Exercisable at June 30, 2013 |  |  | 330,000 |  |  | 2.87 |  | 1.60 |  |  | 6,000 |
The aggregate intrinsic value in the tables above represents the total pretax intrinsic value (the difference between our closing stock price on June 30, 2013 and the exercise price, multiplied by the number of in-the-money options or warrants, as applicable) that would have been received by the holder had all holders exercised their options or warrants, as applicable, on June 30, 2013. The total intrinsic value of options and warrants exercised during the six months ended June 30, 2013 and 2012 was approximately $2.3 million and $265,000, respectively. As of June 30, 2013, total unrecognized stock-based compensation expense related to non-vested employee awards was approximately $470,000, which is expected to be recognized over a weighted average period of approximately 0.8 years. Restricted Stock Awards The 2006 Plan permits the award of restricted stock. On January 2, 2013, we granted awards for 450,000 shares of our common stock to certain employees. Of the awards granted, 170,000 were vested on the award date, 140,000 cliff vest after one year provided that the employees remain continuously employed through the vesting date and 140,000 cliff vest after two years provided that the employees remain continuously employed through the vesting date. We valued the awards based on the closing market price of our stock on January 2, 2013 which was $2.51 per share. On April 1, 2013, we granted an award for 200,000 shares of our common stock to an affiliated physician. Of this award granted, 40,000 was vested on the award date, 40,000 cliff vests after one year provided that the affiliated physician remains continuously affiliated with the Company through the vesting date, 40,000 cliff vests after two years provided that the affiliated physician remains continuously affiliated with the Company through the vesting date, 40,000 cliff vests after three years provided that the affiliated physician remains continuously affiliated with the Company through the vesting date and 40,000 cliff vests after four years provided that the affiliated physician remains continuously affiliated with the Company through the vesting date. We valued this award based on the closing market price of our stock on April 1, 2013 which was $2.82 per share. At June 30, 2013, the total unrecognized fair value of all restricted stock awards was approximately $1.6 million, which will be recognized over the remaining vesting period of 3.75 years. In sum, of the 11,000,000 shares of common stock reserved for issuance under the 2006 Plan, at June 30, 2013, we had 7,138,750 options, warrants and shares of restricted stock outstanding, 20,000 options exercised and 3,841,250 available for grant.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65, A240 -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 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-6 -Paragraph 53 -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. + Details
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