Property, Plant and Equipment (Tables)

3 Months Ended

Jun. 30, 2017

Property, Plant and Equipment [Abstract]

Schedule of Costs and Accumulated Depreciation of Plant and Equipment

The cost and accumulated depreciation of property and equipment at June 30, 2017 and March 31, 2017 are as follows (in thousands):

	June 30, 2017			March 31, 2017
Land	$	3,643		$	3,643
Construction in progress - equipment	471			601
Buildings	34,549			34,549
Equipment and software	73,345			73,445
Furniture and fixtures	1,185			1,201
Leasehold improvements	1,907			2,442
Property, plant and equipment, gross	115,100			115,881
Less accumulated depreciation	(75,818		)	(72,443		)
Property, plant and equipment, net	$	39,282		$	43,438