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Segment Information - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019
Segment Reporting Information [Line Items]
Long lived assets	$ 75,568		$ 75,568		$ 78,552
United States
Segment Reporting Information [Line Items]
Long lived assets	27,100		27,100		29,800
China
Segment Reporting Information [Line Items]
Long lived assets	36,000		36,000		36,400
Switzerland
Segment Reporting Information [Line Items]
Long lived assets	$ 1,800		$ 1,800		$ 1,700
Geographic Concentration | Consolidated net sales from continuing operations | Switzerland
Segment Reporting Information [Line Items]
Percentage of consolidated net sales	4.00%	4.00%	3.00%	3.00%

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