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Note 13 - Share-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Cost of sales |  | $ | 822 |  |  | $ | 383 |  |  | $ | 12 |
Selling, general, and administrative expense |  |  | 2,266 |  |  |  | 1,326 |  |  |  | 269 |
Total |  | $ | 3,088 |  |  | $ | 1,709 |  |  | $ | 281 |
Schedule of Unvested Restricted Stock Units and Performance Share Awards Activity [Table Text Block] |
|  | Number of RSUs and PSAs (1) |  |  | Weighted- Average Grant Date Fair Value |
Unvested RSUs and PSAs as of December 31, 2019 |  |  | 85,170 |  |  | $ | 23.56 |
RSUs and PSAs granted |  |  | 97,834 |  |  |  | 26.61 |
Unvested RSUs and PSAs canceled |  |  | (3,752 | ) |  |  | 23.56 |
RSUs and PSAs vested (2) |  |  | (49,680 | ) |  |  | 23.56 |
Unvested RSUs and PSAs as of December 31, 2020 |  |  | 129,572 |  |  |  | 25.86 |

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