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Note 10 - Capital Stock and Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 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, 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 |
Granted |  |  | - |  |  |  | - |  |  |  | 918,870 |  |  |  | 4.64 |  |  |  | 320,272 |  |  |  | 5.08 |
Exercised |  |  | (40,267 | ) |  |  | 2.64 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Vested (RSUs) |  |  | - |  |  |  | - |  |  |  | (733,611 | ) |  |  | 4.08 |  |  |  | (401,308 | ) |  |  | 2.11 |
Cancelled/Forfeited |  |  | (125,773 | ) |  |  | 2.77 |  |  |  | (232,622 | ) |  |  | 4.44 |  |  |  | (132,884 | ) |  |  | 4.21 |
Balance at December 31, 2022 |  |  | 1,238,776 |  |  | $ | 3.15 |  |  |  | 1,093,801 |  |  | $ | 3.94 |  |  |  | 646,235 |  |  | $ | 4.51 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Year Ended December 31, |
(in thousands) |  | 2022 |  |  | 2021 |
Weighted average shares outstanding - basic |  |  | 41,413 |  |  |  | 40,343 |
Dilutive effect of equity awards |  |  | - |  |  |  | - |
Weighted average shares outstanding - diluted |  |  | 41,413 |  |  |  | 40,343 |
Shares excluded from diluted loss per share due to their anti-dilutive effect |  |  | 3,661 |  |  |  | 4,274 |
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 |  |  |  | 135,342 |  |  |  | 6.3 |  |  | $ | 1.89 |  |  | $ | 119 |  |  |  | 102,381 |  |  |  | 6.2 |  |  | $ | 1.91 |  |  | $ | 88 |
| 2.63 - 2.78 |  |  |  | 505,423 |  |  |  | 4.4 |  |  |  | 2.63 |  |  |  | 71 |  |  |  | 357,192 |  |  |  | 4.4 |  |  |  | 2.63 |  |  |  | 50 |
| 2.79 - 3.24 |  |  |  | 135,077 |  |  |  | 6.6 |  |  |  | 2.93 |  |  |  | - |  |  |  | 135,077 |  |  |  | 6.6 |  |  |  | 2.93 |  |  |  | - |
| 3.25 - 3.72 |  |  |  | 206,808 |  |  |  | 4.2 |  |  |  | 3.38 |  |  |  | - |  |  |  | 206,808 |  |  |  | 4.2 |  |  |  | 3.38 |  |  |  | - |
| 3.73 - 5.51 |  |  |  | 256,126 |  |  |  | 3.2 |  |  |  | 4.76 |  |  |  | - |  |  |  | 238,222 |  |  |  | 3.0 |  |  |  | 4.83 |  |  |  | - |
$ | 1.78 - 5.51 |  |  |  | 1,238,776 |  |  |  | 4.6 |  |  | $ | 3.15 |  |  | $ | 190 |  |  |  | 1,039,680 |  |  |  | 4.5 |  |  | $ | 3.25 |  |  | $ | 138 |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Year Ended December 31, |
(in thousands) |  | 2022 |  |  | 2021 |
Cost of revenues |  | $ | 121 |  |  | $ | 118 |
Sales and marketing expenses |  |  | 557 |  |  |  | 507 |
General and administrative expenses |  |  | 3,487 |  |  |  | 3,416 |
Research and development expenses |  |  | 246 |  |  |  | 128 |
Total stock-based compensation expenses |  | $ | 4,411 |  |  | $ | 4,169 |
Black Scholes Option Pricing Model [Member] |
Notes Tables |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2022 |  |  | 2021 |
Volatility |  |  | 62.6 | % |  |  | 65.1 | %
Risk-free interest rate |  |  | 2.1 | % |  |  | 0.3 | %
Correlation coefficient |  |  | 41.5 | % |  |  | 35.7 | %
Dividend yield |  |  | - | % |  |  | - | %

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