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Property, Plant and Equipment - Schedule of Costs and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Mar. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 114,464	$ 115,881
Less accumulated depreciation	(77,780)	(72,443)
Property, plant and equipment, net	36,684	43,438
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,643	3,643
Construction in progress - equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,160	601
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	34,549	34,549
Equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	72,566	73,445
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,048	1,201
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 498	$ 2,442

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
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- Definition

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

+ References

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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