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Segment Information - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017
Segment Reporting Information [Line Items]
Long lived assets	$ 87,355		$ 87,355		$ 85,408
United States
Segment Reporting Information [Line Items]
Long lived assets	37,600		37,600		37,100
Switzerland
Segment Reporting Information [Line Items]
Long lived assets	2,000		2,000		2,100
China
Segment Reporting Information [Line Items]
Long lived assets	$ 38,100		$ 38,100		$ 37,200
Geographic Concentration | Consolidated net sales from continuing operations | Switzerland
Segment Reporting Information [Line Items]
Percentage of consolidated net sales	2.00%	3.00%	2.00%	2.00%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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-Publisher FASB
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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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