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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2016
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 12/31/16 |  |  | Weighted Average Remaining Contractual Life (years) |  |  | Weighted Average Exercise Price |  |  | Number Exercisable at 12/31/16 |  |  | Weighted Average Exercise Price |
$ 1.44 - $ 3.50 |  |  | 200,000 |  |  |  | 5.30 |  |  | $ | 2.85 |  |  |  | 147,083 |  |  | $ | 2.78 |
$ 3.51 - $ 5.00 |  |  | 1,426,000 |  |  |  | 2.85 |  |  | $ | 4.23 |  |  |  | 1,426,000 |  |  | $ | 4.23 |
$ 5.01 - $ 6.50 |  |  | 130,000 |  |  |  | 3.63 |  |  | $ | 5.98 |  |  |  | 129,166 |  |  | $ | 5.98 |
$ 6.51 - $ 8.21 |  |  | 90,000 |  |  |  | 0.02 |  |  | $ | 8.21 |  |  |  | 90,000 |  |  | $ | 8.21 |
|  |  | 1,846,000 |  |  |  | 3.03 |  |  | $ | 4.39 |  |  |  | 1,792,249 |  |  | $ | 4.43 |
Summary of assumptions used to value stock options granted to employees and directors |
|  | For the year ended |
|  | December 31, 2016 |
Annual dividend yield |  |  | - |
Expected life (years) |  |  | 3.5 |
Risk-free interest rate |  |  | 0.83 | %
Expected volatility |  |  | 65.46 | %
|  | For the year ended |
|  | December 31, 2015 |
Annual dividend yield |  |  | - |
Expected life (years) |  |  | 2.97 |
Risk-free interest rate |  |  | 0.47% - 1.41 | %
Expected volatility |  |  | 60.07% - 72.33 | %
|  | For the year ended |
|  | December 31, 2014 |
Annual dividend yield |  |  | - |
Expected life (years) |  |  | 3.5 |
Risk-free interest rate |  |  | 0.28% - 1.47 | %
Expected volatility |  |  | 60.68% - 108.75 | %
Summary of stock-based compensation expense |
|  | Years ended |
|  | December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Research and development |  | $ | 48 |  |  | $ | 484 |  |  | $ | 510 |
Sales and marketing |  |  | 150 |  |  |  | 296 |  |  |  | 353 |
General and administrative |  |  | 57 |  |  |  | 295 |  |  |  | 866 |
Stock compensation expense |  | $ | 255 |  |  | $ | 1,075 |  |  | $ | 1,729 |
|  | Remaining unrecognized expense at December 31, 2016 |
Stock-based compensation |  | $ | 84 |
Stock Options [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of all stock option plans / warrant activity |
|  | Options Outstanding |
|  |  |  |  |  |  |  | Weighted- |  |  |  |
|  |  |  |  |  |  |  | Average |  |  |  |
|  |  |  |  | Weighted- |  |  | Remaining |  |  |  |
|  |  |  |  | Average |  |  | Contractual |  |  | Aggregate |
|  | Number of |  |  | Exercise |  |  | Life |  |  | Intrinsic |
|  | Shares |  |  | Price |  |  | (in years) |  |  | Value |
Options outstanding – January 1, 2014 |  |  | 1,600,583 |  |  | $ | 5.22 |  |  |  |  |  |  |  |  |
Options granted |  |  | 405,200 |  |  |  | 6.31 |  |  |  |  |  |  |  |  |
Options exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Options cancelled or expired |  |  | (296,383 | ) |  |  | 5.46 |  |  |  |  |  |  |  |  |
Options outstanding – December 31, 2014 |  |  | 1,709,400 |  |  |  | 4.92 |  |  |  |  |  |  |  |  |
Options granted |  |  | 605,000 |  |  |  | 3.57 |  |  |  |  |  |  |  |  |
Options exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Options cancelled or expired |  |  | (130,283 | ) |  |  | 6.03 |  |  |  |  |  |  |  |  |
Options outstanding – December 31, 2015 |  |  | 2,184,117 |  |  |  | 4.48 |  |  |  |  |  |  |  |  |
Options granted |  |  | 25,000 |  |  |  | 1.44 |  |  |  |  |  |  |  |  |
Options exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Options cancelled or expired |  |  | (363,117 | ) |  |  | 4.73 |  |  |  |  |  |  |  |  |
Options outstanding – December 31, 2016 |  |  | 1,846,000 |  |  | $ | 4.39 |  |  |  | 3.03 |  |  | $ | 10,000 |
Options exercisable and expected to vest – December 31, 2016 |  |  | 1,846,000 |  |  | $ | 4.39 |  |  |  | 3.03 |  |  | $ | 10,000

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