Property, Plant and Equipment (Tables)

6 Months Ended

Sep. 30, 2018

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 September 30, 2018 and March 31, 2018 are as follows (in thousands):

	September 30, 2018			March 31, 2018
Construction in progress - equipment	597			654
Equipment and software	45,797			72,760
Furniture and fixtures	1,307			1,878
Leasehold improvements	1,838			1,426
Property, plant and equipment, gross	49,539			76,718
Less accumulated depreciation	(38,957		)	(64,205		)
Property, plant and equipment, net	$	10,582		$	12,513