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Property, Plant and Equipment - Schedule of Costs and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 49,642	$ 76,718
Less accumulated depreciation	(39,834)	(64,205)
Property, plant and equipment, net	9,808	12,513
Construction in progress - equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	632	654
Equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	45,747	72,760
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,308	1,878
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,955	$ 1,426

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

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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.

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