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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2023
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items] |
Schedule of share-based compensation expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31,
​ |  | 2021 | ​ | 2022 |  | 2023
​ | ​ | (in thousands)
Cost of revenues | ​ | $ | 682 |  | 481 |  | 157
Research and development | ​ | ​ | 17,662 |  | 15,345 |  | 9,414
General and administrative | ​ | ​ | 2,367 |  | 2,193 |  | 1,108
Sales and marketing | ​ | ​ | 3,163 |  | 2,612 |  | 1,453
Total compensation | ​ | $ | 23,874 |  | 20,631 |  | 12,132
Income tax benefit | ​ | $ | 4,896 |  | 4,201 |  | 2,545
Schedule of RSUs activity under the long-term incentive plan | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of |  | Weighted
​ | ​ | Underlying | ​ | Average Grant
​ | ​ | Shares for RSUs | ​ | Date Fair Value
Balance at January 1, 2021 |  | 22,889 | ​ | $ | 3.88
Granted | ​ | 2,604,545 | ​ | ​ | 10.39
Vested | ​ | (2,237,499) | ​ | ​ | 10.37
Forfeited | ​ | (3,415) | ​ | ​ | 4.38
Balance at December 31, 2021 |  | 386,520 | ​ |  | 10.17
Granted |  | 3,987,509 | ​ |  | 5.09
Vested |  | (3,563,177) | ​ |  | 5.25
Forfeited |  | (18,643) | ​ |  | 10.15
Balance at December 31, 2022 |  | 792,209 | ​ |  | 6.71
Granted | ​ | 1,710,607 | ​ | ​ | 5.68
Vested | ​ | (1,974,496) | ​ | ​ | 5.91
Forfeited | ​ | (2,355) | ​ | ​ | 9.81
Balance at December 31, 2023 | ​ | 525,965 | ​ | ​ | 6.36
Schedule of allocation of compensation expenses and related tax effects from the RSUs granted to employees under the long-term incentive plan | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31,
​ |  | 2021 | ​ | 2022 |  | 2023
​ | ​ | (in thousands)
Cost of revenues | ​ | $ | 676 |  | 472 |  | 153
Research and development | ​ | ​ | 17,592 |  | 15,097 |  | 9,353
General and administrative | ​ | ​ | 2,343 |  | 1,934 |  | 1,108
Sales and marketing | ​ | ​ | 3,149 |  | 2,497 |  | 1,449
Total compensation | ​ | $ | 23,760 |  | 20,000 |  | 12,063
Income tax benefit | ​ | $ | 4,896 |  | 4,201 |  | 2,545
Schedule of valuation assumptions | ​
​ | ​ | ​ | ​
​ |  | 2019 plan |
Valuation assumptions: |  |  | ​
Expected dividend yield |  | 3.5 | %
Expected volatility |  | 51.96%-57.79 | %
Expected term (years) |  | 1-1.5 | ​
Risk-free interest rate |  | 1.69%-1.75 | %
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Weighted | ​ | average
​ | ​ | ​ | ​ | average | ​ | remaining
​ | ​ | Number | ​ | exercise | ​ | contractual
​ |  | of Units |  | price |  | term
Balance at January 1, 2021 |  | 578,468 | ​ | $ | 2.36 |  | 0.54
Exercised | ​ | (524,387) | ​ | ​ | 2.37 | ​ | ​
Expired | ​ | (54,081) | ​ | ​ | 2.27 | ​ | ​
Balance at December 31, 2021 | ​ | — | ​ | ​ | — | ​ | —
Exercisable at December 31, 2021 |  | — | ​ | ​ | — | ​ | —
CM Visual Technology Corp |
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items] |
Schedule of valuation assumptions | ​
​ | ​ | ​ | ​ | ​
​ |  | 2021 plan
​ | ​ | Granted in | ​ | Granted in
​ | ​ | 2021 | ​ | 2023
Valuation assumptions: | ​ | ​ | ​ | ​
Expected dividend yield |  | 0% |  | 0%
Expected volatility |  | 43.82% |  | 44.17%
Expected term (years) |  | 3.125 |  | 3.125
Risk-free interest rate |  | 0.223% |  | 1.081%
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  | ​ |  |  | Weighted
​ |  | ​ |  | Weighted |  | average
​ |  | ​ |  | average |  | remaining
​ | ​ | Number |  | exercise |  | contractual
​ | ​ | of shares |  | price |  | term
Balance at January 1, 2021 |  | — | ​ | $ | — | ​ | ​
Granted |  | 2,791,000 | ​ |  | 0.36 |  |
Exercised |  | — | ​ |  | — |  |
Forfeited |  | (120,000) | ​ |  | 0.36 |  |
Balance at December 31, 2021 |  | 2,671,000 | ​ |  | 0.36 |  | 3.5
Exercised | ​ | — | ​ | ​ | — | ​ | ​
Forfeited | ​ | (380,000) | ​ | ​ | 0.36 | ​ | ​
Balance at December 31, 2022 | ​ | 2,291,000 | ​ | ​ | 0.36 | ​ | 2.5
Granted | ​ | 288,000 | ​ | ​ | 0.33 | ​ | ​
Exercised | ​ | — | ​ | ​ | — | ​ | ​
Effect of capital reduction | ​ | (1,289,500) | ​ | ​ | 0.36 | ​ | ​
Forfeited | ​ | — | ​ | ​ | — | ​ | ​
Balance at December 31, 2023 | ​ | 1,289,500 | ​ | ​ | 0.50 | ​ | 1.5
Exercisable at December 31, 2023 |  | 572,750 | ​ |  | 0.50 |  | 1.5
Liqxtal Technology Inc |
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items] |
Schedule of valuation assumptions | ​
​ | ​ | ​
​ |  | 2021 plan
Valuation assumptions: | ​ | ​
Expected dividend yield |  | 0%
Expected volatility |  | 30.06%
Expected term (years) |  | 1.25
Risk-free interest rate |  | 0.107%
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  | ​ |  |  | Weighted
​ | ​ | ​ |  | Weighted |  | average
​ | ​ | ​ |  | average |  | remaining
​ |  | Number |  | exercise |  | contractual
​ |  | of shares |  | price |  | term
Balance at January 1, 2021 |  | — | ​ | $ | — |  |
Granted |  | 1,000,000 | ​ |  | 0.65 |  |
Exercised |  | — | ​ |  | — |  |
Forfeited |  | (90,000) | ​ |  | 0.65 |  |
Balance at December 31, 2021 |  | 910,000 | ​ |  | 0.65 |  | 1.0
Exercised | ​ | (840,000) | ​ | ​ | 0.65 | ​ | ​
Forfeited | ​ | (70,000) | ​ | ​ | 0.65 | ​ | ​
Balance at December 31, 2022 | ​ | — | ​ | ​ | — | ​ | —
Exercisable at December 31, 2022 |  | — | ​ |  | — |  | —
Emza |
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items] |
Schedule of valuation assumptions | ​
​ | ​ | ​ | ​
​ |  | 2022 Option Plan |
Valuation assumptions: |  | ​ | ​
Expected dividend yield |  | 0 | %
Expected volatility |  | 54.05 | %
Expected term (years) |  | 6.11 | ​
Risk-free interest rate |  | 0.65 | %
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted
​ | ​ | ​ | ​ | Weighted | ​ | average
​ | ​ | ​ | ​ | average | ​ | remaining
​ | ​ | Number | ​ | exercise | ​ | contractual
​ | ​ | of shares | ​ | price | ​ | term
Balance at January 1, 2022 |  | — | ​ | $ | — |  | ​
Granted |  | 150,940 | ​ |  | 20.49 |  | 6.11
Exercised |  | — | ​ |  | — |  | ​
Forfeited |  | (1,797) | ​ |  | 20.49 |  | ​
Cancelled |  | (149,143) | ​ |  | 20.49 |  | ​
Balance at December 31, 2022 |  | — | ​ |  | — |  | —
Exercisable at December 31, 2022 |  | — | ​ |  | — |  | —
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