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ORDINARY SHARE AND SHARE INCENTIVE PLANS (Tables) | 12 Months Ended
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Dec. 31, 2023
Summary of the Assumptions Used in the Estimating the Fair Values of Stock-based Payment Awards Excluding Non-employee |
|  | Years ended December 31, |
Stock Options: |  | 2023 |  |  | 2016 |
Expected term in years |  |  | 4.25 |  |  |  | 4.75 |
Weighted average risk-free interest rate |  |  | 1.02 | % |  |  | 1.30 | %
Expected dividend rate |  |  | — | % |  |  | — | %
Volatility |  |  | 55.21 | % |  |  | 51.6 | %
Summary of Stock-based Compensation Expense Recognized in Consolidated Statements of Comprehensive Loss |
|  | Years Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
|  | (in thousands) |
Cost of net sales |  | $ | 28 |  |  | $ | 97 |  |  | $ | 87 |
Selling, general and administrative |  |  | 151 |  |  |  | 258 |  |  |  | 236 |
Research and development |  |  | 114 |  |  |  | 248 |  |  |  | 181 |
Total |  | $ | 293 |  |  | $ | 603 |  |  | $ | 504 |
2017 Equity Incentive Plan |
Summary of Stock Options Activity |
|  |  |  |  | Weighted |
|  | Number of |  |  | average |
|  | shares |  |  | exercise |
|  | outstanding |  |  | price |
|  | (in thousands) |  |  |  |
Options Outstanding, December 31, 2021 |  |  | 364 |  |  | $ | 4.47 |
Options granted |  |  | — |  |  |  | — |
Options exercised |  |  | (4 | ) |  |  | 4.52 |
Options forfeited or expired |  |  | (13 | ) |  |  | 6.59 |
Options Outstanding, December 31, 2022 |  |  | 347 |  |  | $ | 4.39 |
Options granted |  |  | — |  |  |  | — |
Options exercised |  |  | (1 | ) |  |  | 4.28 |
Options cancelled |  |  | (8 | ) |  |  | 4.45 |
Options forfeited or expired |  |  | (16 | ) |  |  | 4.44 |
Options Outstanding, December 31, 2023 |  |  | 322 |  |  | $ | 4.39 |
Summary of Unvested Restricted Awards |
|  |  |  |  | Weighted |
|  |  |  |  | average |
|  |  |  |  | grant date |
|  | Shares |  |  | fair value |
|  | (in thousands) |  |  |  |
Total nonvested restricted stock at December 31, 2021 |  |  | 59 |  |  | $ | 9.56 |
Granted |  |  | 29 |  |  |  | 3.97 |
Vested |  |  | (44 | ) |  |  | 9.66 |
Forfeited |  |  | (1 | ) |  |  | 14.82 |
Total nonvested restricted stock at December 31, 2022 |  |  | 43 |  |  | $ | 5.65 |
Granted |  |  | 30 |  |  |  | 3.79 |
Vested |  |  | (38 | ) |  |  | 5.32 |
Forfeited |  |  | — |  |  |  | — |
Total nonvested restricted stock at December 31, 2023 |  |  | 35 |  |  | $ | 3.28 |
Summary of Significant Ranges of Outstanding and Exercisable Stock Options |
|  |  |  |  |  |  |  |  | Weighted |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Number of shares |  |  | Average |  |  | Weighted |  |  | Number of shares |  |  | Weighted |
Range of |  |  | Outstanding |  |  | Remaining |  |  | Average |  |  | Exercisable |  |  | Average |
Exercise Prices |  |  | as of 12/31/2023 |  |  | Contractual Term |  |  | Exercise Price |  |  | as of 12/31/2023 |  |  | Exercise Price |
$ | 4.28 |  |  | $ | 4.28 |  |  |  | 194,777 |  |  | 4.92 |  |  | $ | 4.28 |  |  |  | 194,777 |  |  | $ | 4.28 |
$ | 4.56 |  |  | $ | 4.56 |  |  |  | 127,019 |  |  |  | 3.92 |  |  | $ | 4.56 |  |  |  | 127,019 |  |  | $ | 4.56 |
|  | Number of shares |  |  | Weighted average exercise price |
Options exercisable as of December 31, 2023 |  |  | 321,796 |  |  | $ | 4.39 |
Options vested and expected to vest as of December 31, 2023 |  |  | 321,796 |  |  | $ | 4.39 |

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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