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Note 10 - Capital Stock and Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule Of Stock Options And Restricted Stock Units Activity Roll forward [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, 2019 |  |  | 2,266,122 |  |  | $ | 3.93 |  |  |  | 1,590,450 |  |  | $ | 2.27 |  |  |  | 529,491 |  |  | $ | 1.67 |
Granted |  |  | 894,154 |  |  |  | 2.61 |  |  |  | 1,027,486 |  |  |  | 2.75 |  |  |  | 332,622 |  |  |  | 2.98 |
Exercised |  |  | (253,853 | ) |  |  | 3.94 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Vested (RSUs) |  |  | - |  |  |  | - |  |  |  | (930,985 | ) |  |  | 2.41 |  |  |  | (240,205 | ) |  |  | 1.53 |
Cancelled/Forfeited |  |  | (269,084 | ) |  |  | 3.68 |  |  |  | (126,490 | ) |  |  | 3.13 |  |  |  | (41,932 | ) |  |  | 3.04 |
Performance Factor Adjustment |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 233,055 |  |  |  | 1.47 |
Balance at December 31, 2020 |  |  | 2,637,339 |  |  |  | 3.51 |  |  |  | 1,560,461 |  |  | $ | 2.44 |  |  |  | 813,031 |  |  |  | 2.12 |
Granted |  |  | - |  |  |  | - |  |  |  | 820,831 |  |  |  | 4.74 |  |  |  | 293,509 |  |  |  | 4.61 |
Exercised |  |  | (579,968 | ) |  |  | 3.77 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Vested (RSUs) |  |  | - |  |  |  | - |  |  |  | (1,167,473 | ) |  |  | 2.88 |  |  |  | (403,422 | ) |  |  | 2.11 |
Cancelled/Forfeited |  |  | (652,555 | ) |  |  | 4.24 |  |  |  | (72,655 | ) |  |  | 3.67 |  |  |  | (6,179 | ) |  |  | 2.98 |
Performance Factor Adjustment |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 163,216 |  |  |  | 2.98 |
Balance at December 31, 2021 |  |  | 1,404,816 |  |  | $ | 3.10 |  |  |  | 1,141,164 |  |  | $ | 3.57 |  |  |  | 860,155 |  |  | $ | 3.13 |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Year Ended December 31, |
(in thousands) |  | 2021 |  |  | 2020 |
Basic |  |  | 40,343 |  |  |  | 38,640 |
Dilutive effect of equity awards |  |  | - |  |  |  | - |
Diluted |  |  | 40,343 |  |  |  | 38,640 |
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block] |
|  |  |  | Options Outstanding |  |  | Options Exercisable |
|  |  |  |  |  |  |  | Weighted |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  | Average |  |  | Weighted |  |  |  |  |  |  |  |  |  |  | Average |  |  | Weighted |  |  |  |  |
Range of |  |  |  |  |  |  | Remaining |  |  | Average |  |  | Aggregate |  |  |  |  |  |  | Remaining |  |  | Average |  |  | Aggregate |
Exercise |  |  | Number |  |  | Contractual Life |  |  | Exercise |  |  | Intrinsic |  |  | Shares |  |  | Contractual Life |  |  | Exercise |  |  | Intrinsic |
Price |  |  | Outstanding |  |  | in Years |  |  | Price |  |  | Value |  |  | Exercisable |  |  | in Years |  |  | Price |  |  | Value |
$ | 1.78 - 2.62 |  |  |  | 188,253 |  |  |  | 6.4 |  |  | $ | 2.08 |  |  | $ | 935 |  |  |  | 90,551 |  |  |  | 6.1 |  |  | $ | 2.09 |  |  | $ | 449 |
| 2.63 - 2.78 |  |  |  | 586,160 |  |  |  | 5.4 |  |  |  | 2.63 |  |  |  | 2,591 |  |  |  | 234,299 |  |  |  | 5.4 |  |  |  | 2.63 |  |  |  | 1,036 |
| 2.79 - 3.24 |  |  |  | 160,071 |  |  |  | 7.6 |  |  |  | 2.95 |  |  |  | 656 |  |  |  | 99,751 |  |  |  | 7.5 |  |  |  | 2.95 |  |  |  | 409 |
| 3.25 - 3.72 |  |  |  | 206,808 |  |  |  | 5.2 |  |  |  | 3.38 |  |  |  | 760 |  |  |  | 206,808 |  |  |  | 5.2 |  |  |  | 3.38 |  |  |  | 760 |
| 3.73 - 5.51 |  |  |  | 263,524 |  |  |  | 4.3 |  |  |  | 4.73 |  |  |  | 611 |  |  |  | 219,931 |  |  |  | 3.7 |  |  |  | 4.91 |  |  |  | 471 |
$ | 1.78 - 5.51 |  |  |  | 1,404,816 |  |  |  | 5.6 |  |  | $ | 3.10 |  |  | $ | 5,553 |  |  |  | 851,340 |  |  |  | 5.2 |  |  | $ | 3.38 |  |  | $ | 3,125 |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Year Ended December 31, |
(in thousands) |  | 2021 |  |  | 2020 |
Cost of revenues |  | $ | 118 |  |  | $ | 65 |
Sales and marketing expenses |  |  | 507 |  |  |  | 263 |
General and administrative expenses |  |  | 3,416 |  |  |  | 3,122 |
Research and development expenses |  |  | 128 |  |  |  | 197 |
Total stock-based compensation expenses |  | $ | 4,169 |  |  | $ | 3,647 |
Monte-Carlo Valuation Simulation [Member] |
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2021 |  |  | 2020 |
Volatility |  |  | 65.1 | % |  |  | 80.6 | %
Risk-free interest rate |  |  | 0.3 | % |  |  | 0.2 | %
Correlation coefficient |  |  | 35.7 | % |  |  | 31.5 | %
Dividend yield |  |  | - | % |  |  | - | %
Black Scholes Option Pricing Model [Member] |
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2020 |
Volatility |  |  | 58.3 | %
Risk-free interest rate |  |  | 0.3 | %
Expected holding period (in years) |  |  | 4.4 |
Dividend Yield |  |  | - | %

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