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Segment Information - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2018
Segment Reporting Information [Line Items]      
Long lived assets $ 84,721   $ 86,304
Switzerland      
Segment Reporting Information [Line Items]      
Long lived assets 1,700   1,900
United States      
Segment Reporting Information [Line Items]      
Long lived assets 34,100   35,300
China      
Segment Reporting Information [Line Items]      
Long lived assets $ 38,400   $ 37,900
Geographic Concentration | Consolidated net sales from continuing operations | Switzerland      
Segment Reporting Information [Line Items]      
Percentage of consolidated net sales 2.00% 1.00%