Property, Plant and Equipment (Tables)

12 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

Schedule of Cost and Accumulated Depreciation of Property and Equipment

The Company accounts for depreciation and amortization using the straight-line method to allocate the cost of property, plant and equipment over their estimated useful lives as follows:

Asset Classification	Estimated Useful Life in Years
Building	40
Process upgrades to the building	10-40
Machinery and equipment	3-10
Furniture and fixtures	3-5
Leasehold improvements	Shorter of the estimated useful life or the remaining lease term

The cost and accumulated depreciation of property and equipment at March 31, 2018 and 2017 are as follows (in thousands):

	March 31, 2018			March 31, 2017
Land	$	—		$	3,643
Construction in progress - equipment	654			601
Buildings	—			34,549
Equipment and software	72,760			73,445
Furniture and fixtures	1,878			1,201
Leasehold improvements	1,426			2,442
Property, plant and equipment, gross	76,718			115,881
Less accumulated depreciation	(64,205		)	(72,443		)
Property, plant and equipment, net	$	12,513		$	43,438