Fixed assets consisted of the following (in thousands):


	Estimated Useful Life	March 31,
	In Years	2026			2025
Furniture and fixtures	3-7	$	9,680		$	9,586
Computer equipment and internal use software	2-3		199,581			191,098
Leasehold improvements (1)	up to 12		52,097			52,175
Demonstration and spare part units	2-3		19,477			19,805
			280,835			272,664
Less – accumulated depreciation			(257,277	)		(251,135	)
		$	23,558		$	21,529

(1)

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

Depreciation expense was $10.2 million, $11.9 million, and $15.9 million for the fiscal years ended March 31, 2026, 2025 and 2024, respectively.