FIXED ASSETS

12 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

FIXED ASSETS

FIXED ASSETS

Fixed assets consisted of the following (in thousands):

	Estimated Useful Life in Years	March 31,
		2020		2019
Furniture and fixtures	3-7	$	9,561	$	9,373
Computer equipment and internal use software	3-5	170,518		158,797
Demonstration and spare part units	2-5	51,910		17,928
Leasehold improvements (1)	up to 12	19,626		46,662
		251,615		232,760
Less – accumulated depreciation		(193,900)		(173,809)
		$	57,715	$	58,951

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

Depreciation expense was $23.4 million, $27.4 million and $34.7 million for the fiscal years ended March 31, 2020, 2019 and 2018, respectively.