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Note 9 - Capital Stock and Stock-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2020
Notes Tables |
Schedule Of Stock Options And Restricted Stock Units Activity Roll forward [Table Text Block] |
|  | Stock Options |  |  | Restricted Stock Units |  |  | Market Condition RSUs |
|  | Stock |  |  | Weighted |  |  | Restricted |  |  |  |  |  |  | Market |  |  |  |  |
|  | Options |  |  | Average |  |  | Stock Units |  |  | Grant Date |  |  | Condition RSUs |  |  | Grant Date |
|  | Outstanding |  |  | Exercise Price |  |  | Outstanding |  |  | Fair Value |  |  | Outstanding |  |  | Fair Value |
Balance at December 31, 2019 |  |  | 2,266,122 |  |  | $ | 3.93 |  |  |  | 1,590,450 |  |  | $ | 2.27 |  |  |  | 529,491 |  |  | $ | 1.67 |
Granted |  |  | 894,154 |  |  |  | 2.61 |  |  |  | 1,001,113 |  |  |  | 2.73 |  |  |  | 332,622 |  |  |  | 2.98 |
Exercised |  |  | (9,994 | ) |  |  | 2.56 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Vested (RSUs) |  |  | - |  |  |  | - |  |  |  | (748,096 | ) |  |  | 2.34 |  |  |  | (233,056 | ) |  |  | 1.47 |
Cancelled/Forfeited |  |  | (253,419 | ) |  |  | 3.43 |  |  |  | (89,864 | ) |  |  | 3.27 |  |  |  | (39,286 | ) |  |  | 3.03 |
Market Condition RSU - Performance Factor Adjustment |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 233,055 |  |  |  | 1.47 |
Balance at September 30, 2020 |  |  | 2,896,863 |  |  | $ | 3.56 |  |  |  | 1,753,603 |  |  | $ | 2.46 |  |  |  | 822,826 |  |  | $ | 2.13 |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
|  | (in thousands) |  |  |  |  |  |  |  |  |
Cost of revenues |  | $ | 19 |  |  | $ | 13 |  |  | $ | 43 |  |  | $ | 34 |
Sales and marketing expenses |  |  | 92 |  |  |  | 39 |  |  |  | 205 |  |  |  | 68 |
General and administrative expenses |  |  | 908 |  |  |  | 895 |  |  |  | 2,249 |  |  |  | 1,975 |
Research and development expenses |  |  | 60 |  |  |  | 40 |  |  |  | 144 |  |  |  | 116 |
Total stock-based compensation expenses |  | $ | 1,079 |  |  | $ | 987 |  |  | $ | 2,641 |  |  | $ | 2,193 |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30 ,2020 |  |  | September 30, 2019 |  |  | September 30 ,2020 |  |  | September 30, 2019 |
Basic |  |  | 38,920,041 |  |  |  | 38,036,261 |  |  |  | 38,539,703 |  |  |  | 37,764,489 |
Dilutive effect of equity awards |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Diluted |  |  | 38,920,041 |  |  |  | 38,036,261 |  |  |  | 38,539,703 |  |  |  | 37,764,489 |
Monte-Carlo Valuation Simulation [Member] |
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
Volatility |  |  | 80.6 | %
Risk-free interest rate |  |  | 0.2 | %
Correlation coefficient |  |  | 0.3 |
Dividend Yield |  |  | - | %
Black Scholes Option Pricing Model [Member] |
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
Volatility |  |  | 58.3 | %
Risk-free interest rate |  |  | 0.3 | %
Expected holding period (in years) |  |  | 4.4 |
Dividend Yield |  |  | - | %

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