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ORDINARY SHARE AND SHARE INCENTIVE PLANS (Tables)

12 Months Ended

Dec. 31, 2022

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:		2022				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,
		2022				2021				2020
		(in thousands)
Cost of net sales		$	97			$	87			$	89
Selling, general and administrative			258				236				360
Research and development			248				181				254
Total		$	603			$	504			$	703

2017 Equity Incentive Plan

Summary of Stock Options Activity

						Weighted
		Number of				average
		shares				exercise
		outstanding				price
		(in thousands)
Options Outstanding, December 31, 2020			264			$	5.32
Options granted			213				4.28
Options exercised			—				—
Options forfeited or expired			(113	)			6.08
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

Summary of Unvested Restricted Awards

						Weighted
						average
						grant date
		Shares				fair value
		(in thousands)
Total nonvested restricted stock at December 31, 2020			105			$	12.20
Granted			24				5.16
Vested			(49	)			10.84
Forfeited			(21	)			14.84
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

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 12/31/2022				Contractual Term				Exercise Price				as of 12/31/2022				Exercise Price
$	4.28			$	4.28				205,969			5.92				$	4.28				102,659			$	4.28
$	4.56			$	4.56				140,714				4.90			$	4.56				140,714			$	4.56

		Number of shares				Weighted average exercise price
Options exercisable as of December 31, 2022			243,373			$	4.44
Options vested and expected to vest as of December 31, 2022			346,683			$	4.39

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- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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