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Note 8 - Capital Stock and Stock-based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2022
Notes Tables |
Schedule Of Stock Options And Restricted Stock Units Activity Roll forward [Table Text Block] |
|  |  |  |  |  | Weighted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Stock |  |  | Average |  |  | Time-Based |  |  |  |  |  |  | Performance- |  |  |  |  |
|  | Options |  |  | Exercise |  |  | RSUs |  |  | Grant Date |  |  | Based RSUs |  |  | Grant Date |
|  | Outstanding |  |  | Price |  |  | Outstanding |  |  | Fair Value |  |  | Outstanding |  |  | Fair Value |
Balance at December 31, 2021 |  |  | 1,404,816 |  |  | $ | 3.10 |  |  |  | 1,141,164 |  |  | $ | 3.57 |  |  |  | 860,155 |  |  | $ | 3.13 |
Granted |  |  | - |  |  |  | - |  |  |  | 690,051 |  |  |  | 5.11 |  |  |  | 205,122 |  |  |  | 5.92 |
Exercised |  |  | (15,597 | ) |  |  | 2.72 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Vested (RSUs) |  |  | - |  |  |  | - |  |  |  | (232,157 | ) |  |  | 3.77 |  |  |  | (163,223 | ) |  |  | 2.98 |
Cancelled/Forfeited |  |  | (29,928 | ) |  |  | 2.93 |  |  |  | (54,631 | ) |  |  | 4.47 |  |  |  | (7,823 | ) |  |  | 3.18 |
Balance at June 30, 2022 |  |  | 1,359,291 |  |  | $ | 3.11 |  |  |  | 1,544,427 |  |  | $ | 4.19 |  |  |  | 894,231 |  |  | $ | 3.80 |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(in thousands) |  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Cost of revenues |  | $ | 52 |  |  | $ | 31 |  |  | $ | 88 |  |  | $ | 51 |
Sales and marketing expenses |  |  | 192 |  |  |  | 131 |  |  |  | 346 |  |  |  | 224 |
General and administrative expenses |  |  | 923 |  |  |  | 969 |  |  |  | 1,714 |  |  |  | 1,803 |
Research and development expenses |  |  | 72 |  |  |  | 33 |  |  |  | 114 |  |  |  | 54 |
Total stock-based compensation expenses |  | $ | 1,239 |  |  | $ | 1,164 |  |  | $ | 2,262 |  |  | $ | 2,132 |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(in thousands) |  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Basic |  |  | 41,304 |  |  |  | 40,152 |  |  |  | 41,256 |  |  |  | 39,960 |
Dilutive effect of equity awards |  |  | 1,256 |  |  |  | - |  |  |  | - |  |  |  | - |
Diluted |  |  | 42,560 |  |  |  | 40,152 |  |  |  | 41,256 |  |  |  | 39,960 |
Black Scholes Option Pricing Model [Member] |
Notes Tables |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2022 |
Volatility |  |  | 65.1 | %
Risk-free interest rate |  |  | 1.4 | %
Correlation coefficient |  |  | 38.5 | %
Dividend yield |  |  | - | %

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