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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of options outstanding by exercise price range |
Options Outstanding |  | Options Exercisable |
Range of Exercise Price |  | Number Outstanding at 12/31/13 |  | Weighted Average Remaining Contractual Life (years) |  | Weighted Average Exercise Price |  | Number Exercisable at 12/31/13 |  | Weighted Average Exercise Price |
$ $4.02 - $ 4.25 |  |  | 1,241,000 |  | 5.3 |  | $ | 4.24 |  | 1,097,694 |  | $ | 4.25 |
$ 4.26 - $ 7.70 |  |  | 348,583 |  | 6.1 |  | $ | 5.43 |  | 114,526 |  | $ | 5.25 |
$ 7.71 - $ 122.50 |  |  | 11,000 |  | 0.7 |  | $ | 108.45 |  | 11,000 |  | $ | 108.45 |
|  |  | 1,600,583 |  | 5.4 |  | $ | 5.22 |  | 1,223,220 |  | $ | 5.28 |
Summary of assumptions used to value stock options granted to employees and directors |
|  | For the year |
|  | ended December 31, 2013 |
Annual dividend yield |  |  | - |
Expected life (years) |  |  | 4.3 |
Risk-free interest rate |  |  | 0.65% - 2.15 | %
Expected volatility |  |  | 117% - 154 | %
|  | For the year |
|  | ended December 31, 2012 |
Annual dividend yield |  |  | - |
Expected life (years) |  |  | 3.8 – 4.3 |
Risk-free interest rate |  |  | 0.43% - 0.62 | %
Expected volatility |  |  | 169% - 187 | %
Summary of stock-based compensation expense |
|  | Years ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Research and development |  | $ | 267 |  |  | $ | 315 |  |  | $ | 11 |
Sales and marketing |  |  | 909 |  |  |  | 1,407 |  |  |  | 99 |
General and administrative |  |  | 1,480 |  |  |  | 1,777 |  |  |  | 440 |
Stock compensation expense |  | $ | 2,656 |  |  | $ | 3,499 |  |  | $ | 550 |
|  | Remaining unamortized expense at December 31, 2013 |
Stock-based compensation |  | $ | 1,751 |
Summary of all warrant activity |
Outstanding and exercisable |  | Warrants |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life |
January 1, 2012 |  |  | 5,405,606 |  |  | $ | 1.57 |  |  |  | 2.45 |
Issued |  |  | - |  |  |  | - |  |  |  | - |
Expired/forfeited |  |  | (232 | ) |  | $ | 31.75 |  |  |  | - |
Exercised |  |  | (700,738 | ) |  | $ | 1.18 |  |  |  | - |
December 31, 2012 |  |  | 4,704,636 |  |  | $ | 1.61 |  |  |  | 1.41 |
Issued |  |  | - |  |  |  | - |  |  |  | - |
Expired/forfeited |  |  | - |  |  |  | - |  |  |  | - |
Exercised |  |  | (3,876,063 | ) |  | $ | 1.45 |  |  |  | - |
Outstanding and exercisable, December 31, 2013 |  |  | 828,573 |  |  | $ | 2.39 |  |  |  | 2.06 |
Stock Options [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of all stock option plans / warrant activity |
| Weighted Average Number of Shares |  |  | Exercise Price Per Share |  |  | Weighted-Average Exercise Price |
Outstanding at January 1, 2011 |  |  | 19,804 |  |  | $ | 35.39 – 687.50 |  |  | $ | 101.36 |
Granted |  |  | — |  |  | $ | — |  |  | $ | — |
Cancelled or expired |  |  | (480 | ) |  | $ | 135.00 – 687.50 |  |  | $ | 523.23 |
Exercised |  |  | — |  |  | $ | — |  |  | $ | — |
Outstanding at December 31, 2011 |  |  | 19,324 |  |  | $ | 35.39 – 368.75 |  |  | $ | 92.19 |
Granted |  |  | 1,704,000 |  |  | $ | 4.02 – 6.28 |  |  | $ | 4.35 |
Cancelled or expired |  |  | (8,124 | ) |  | $ | 35.39 – 368.75 |  |  | $ | 69.36 |
Exercised |  |  | — |  |  | $ | — |  |  | $ | — |
Outstanding, vested and expected to vest at December 31, 2012 |  |  | 1,715,200 |  |  | $ | 4.02 – 125.00 |  |  | $ | 5.04 |
Granted |  |  | 145,000 |  |  | $ | 5.54 - 7.70 |  |  | $ | 6.06 |
Cancelled or expired |  |  | (18,256 | ) |  | $ | 4.25- 125.00 |  |  | $ | 5.57 |
Exercised |  |  | (241,361 | ) |  | $ | 4.25 – 6.28 |  |  | $ | 4.39 |
Outstanding, vested and expected to vest at December 31, 2013 |  |  | 1,600,583 |  |  | $ | 4.02 – 122.50 |  |  | $ | 5.22 |
Warrant [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of all stock option plans / warrant activity |
Description |  | Issue Date |  | Exercise Price |  | Shares |  | Expiration Date |
August 2009 Employee Warrants |  | 8/25/2009 |  | $ | 0.50 |  | 80,000 |  |  | 8/25/2016 |
2007 Debt Extension Warrants |  | 9/22/2010 |  | $ | 1.00 |  | 16,000 |  |  | 9/22/2015 |
December 2010 Employee Warrants |  | 12/3/2010 |  | $ | 1.63 |  | 200,000 |  |  | 12/3/2015 |
January 2011 Employee Warrant |  | 1/21/2011 |  | $ | 2.00 |  | 7,000 |  |  | 1/21/2014 |
February 2011 Legal Advisor Warrant |  | 2/22/2011 |  | $ | 2.50 |  | 80,000 |  |  | 2/22/2016 |
March 2011 Investor Warrants |  | 3/9/2011 |  | $ | 3.13 |  | 371,473 |  |  | 3/9/2016 |
March 2011 Investor Warrants |  | 4/7/2011 |  | $ | 3.13 |  | 34,100 |  |  | 4/7/2016 |
May 2011 Consultant Warrant |  | 5/17/2011 |  | $ | 4.05 |  | 20,000 |  |  | 5/17/2014 |
September 2011 Employee Warrant |  | 9/12/2011 |  | $ | 3.90 |  | 20,000 |  |  | 9/12/2014 |
Total Warrants Outstanding |  |  |  |  |  |  | 828,573 |  |  |  |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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