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Segment Information - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2018
Segment Reporting Information [Line Items]
Long lived assets	$ 81,577		$ 81,577		$ 86,304
Switzerland
Segment Reporting Information [Line Items]
Long lived assets	1,700		1,700		1,900
United States
Segment Reporting Information [Line Items]
Long lived assets	31,200		31,200		35,300
China
Segment Reporting Information [Line Items]
Long lived assets	$ 37,900		$ 37,900		$ 37,900
Geographic Concentration | Consolidated net sales from continuing operations | Switzerland
Segment Reporting Information [Line Items]
Percentage of consolidated net sales	3.00%	1.00%	3.00%	2.00%

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