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ORDINARY SHARE AND SHARE INCENTIVE PLANS - Allocation of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock based compensation expense
Stock-based compensation expense recognized	$ 504	$ 703	$ 1,399
Cost of Net Sales
Stock based compensation expense
Stock-based compensation expense recognized	87	89	136
Selling, general and administrative
Stock based compensation expense
Stock-based compensation expense recognized	236	360	985
Research and development
Stock based compensation expense
Stock-based compensation expense recognized	$ 181	$ 254	$ 278

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

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-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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