Property, Plant and Equipment (Tables)

12 Months Ended

Mar. 31, 2017

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, 2017 and 2016 are as follows (in thousands):

	March 31, 2017			March 31, 2016
Land	$	3,643		$	3,643
Construction in progress - equipment	601			601
Buildings	34,549			34,549
Equipment and software	73,445			73,659
Furniture and fixtures	1,201			1,215
Leasehold improvements	2,442			3,600
Property, plant and equipment, gross	115,881			117,267
Less accumulated depreciation	(72,443		)	(67,489		)
Property, plant and equipment, net	$	43,438		$	49,778