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Capital Stock (Tables) | 6 Months Ended
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Jun. 30, 2019
Capital Stock Disclosure [Abstract] |
Schedule Of Stock Options And Restricted Stock Units Activity Rollforward [Table Text Block] |
|  |  | Stock Options |  | Restricted Stock Units |  | Market Condition RSU's
|  |  |  |  |  | Weighted |  |  |  |  |  |  |  |  |  |  |  |
|  |  | Stock |  |  | Average |  | Restricted |  |  |  |  |  | Market |  |  |  |
|  |  | Options |  |  | Exercise |  | Stock Units |  |  | Grant Date |  | Condition RSU's |  |  | Grant Date
|  |  | Outstanding |  |  | Price |  | Outstanding |  |  | Fair Value |  | Outstanding |  |  | Fair Value
Balance at December 31, 2018 |  | 1,956,732 |  |  | $ | 4.25 |  | 1,233,762 |  |  | $ | 3.36 |  | 116,944 |  |  | $ | 4.19
| Granted |  | 587,909 |  |  |  | 3.73 |  | 599,977 |  |  |  | 3.19 |  | 75,514 |  |  |  | 4.16
| Exercised |  | (2,500) |  |  |  | 3.25 |  | - |  |  |  | - |  | - |  |  |  | -
| Expired |  | (2,635) |  |  |  | 2.28 |  | - |  |  |  | - |  | - |  |  |  | -
| Vested (RSUs) |  | - |  |  |  | - |  | (550,200) |  |  |  | 3.46 |  | (3,778) |  |  |  | 4.19
| Cancelled / forfeited |  | (356,649) |  |  |  | 4.03 |  | (229,883) |  |  |  | 3.48 |  | (124,607) |  |  |  | 4.19
Balance at June 30, 2019 |  | 2,182,857 |  |  | $ | 4.15 |  | 1,053,656 |  |  | $ | 3.19 |  | 64,073 |  |  | $ | 4.16
Stock Based Compensation Expense Activity By Function [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended
|  | June 30, |  |  | June 30,
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018
|  | (in thousands)
Cost of revenues | $ | 8 |  | $ | 15 |  | $ | 21 |  | $ | 26
Sales and marketing |  | 36 |  |  | 102 |  |  | 29 |  |  | 226
General and administrative |  | 529 |  |  | 576 |  |  | 1,080 |  |  | 1,273
Research and development |  | 42 |  |  | 41 |  |  | 76 |  |  | 71
Discontinued operations |  | - |  |  | - |  |  | - |  |  | 150
Total stock-based compensation | $ | 615 |  | $ | 734 |  | $ | 1,206 |  | $ | 1,746
Basic and Diluted Shares [Table Text Block] |
|  | Three Months Ended |  | Six Months Ended |
|  | June 30, |  | June 30, |
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |
Basic |  | 37,735,717 |  | 36,082,258 |  | 37,682,539 |  | 35,774,334 |
Effect of assumed conversion of employee and director stock options, restricted stock units and Market Condition RSUs |  | - |  | - |  | - |  | - |
Diluted |  | 37,735,717 |  | 36,082,258 |  | 37,682,539 |  | 35,774,334 |
Black-Scholes option pricing model [Member] |
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items] |
Table Of Assumptions [Table Text Block] |
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Volatility | 47.76 | % |  | 42.31 | % |  | 45.69 | % |  | 42.31 | %
Risk-free interest rate | 1.86 | % |  | 2.82 | % |  | 2.42 | % |  | 2.82 | %
Expected holding period (in years) | 4.70 | years |  | 4.95 | years |  | 4.73 | years |  | 4.95 | years
Dividend yield | - | % |  | - | % |  | - | % |  | - | %
Monte-Carlo valuation simulation [Member] |
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items] |
Table Of Assumptions [Table Text Block] |
| Six Months Ended
| June 30,
| 2019 |  | 2018
Volatility | 48.00 | % |  | 44.02 | %
Risk-free interest rate | 2.50 | % |  | 2.27 | %
Correlation coefficient | 0.27 | % |  | 0.07 | %
Dividend yield | - | % |  | - | %

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