FIXED ASSETS

12 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

FIXED ASSETS

FIXED ASSETS

Fixed assets consist of the following (in thousands):

	Estimated Useful Life in Years	March 31,
		2019			2018
Furniture and fixtures	3-7	$	9,373		$	6,596
Computer equipment and internal use software	3-5	158,797			147,237
Demonstration and spare part units	2-5	17,928			31,338
Leasehold improvements (1)	up to 12	46,662			19,340
		232,760			204,511
Less – accumulated depreciation		(173,809		)	(152,000		)
		$	58,951		$	52,511

(1) Leasehold improvements are depreciated over the shorter of the lease term or anticipated useful life of the improvement.

Depreciation expense was $27.4 million, $34.7 million and $33.0 million for the fiscal years ended March 31, 2019, 2018 and 2017, respectively.