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Segment Information - Narrative (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020	Mar. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment	1
Long lived assets	$ 114,693		$ 114,060
Switzerland
Segment Reporting Information [Line Items]
Long lived assets	6,800		5,700
United States
Segment Reporting Information [Line Items]
Long lived assets	19,700		20,500
China
Segment Reporting Information [Line Items]
Long lived assets	$ 73,100		$ 74,000
Geographic Concentration | Consolidated net sales from continuing operations | Switzerland
Segment Reporting Information [Line Items]
Percentage of consolidated net sales	3.00%	2.00%

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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