Property, plant and equipment

12 Months Ended

Mar. 31, 2022

Property, Plant and Equipment [Abstract]

Property, plant and equipment

Property, plant and equipment

Property, plant and equipment comprises owned and right-of-use assets. The Company leases many assets including property, motor vehicles and office equipment.

The cost and accumulated depreciation of owned assets are as follows (in thousands):

	As of March 31,
	2021		2022
Owned assets
Plant and equipment	719		791
Motor vehicles	993		1,938
Furniture, fixtures and equipment	1,519		1,553
Computer and radio equipment	3,639		4,036
In-vehicle devices	53,448		65,881
Assets in progress	7		332
Owned assets, gross	60,325		74,531
Less: accumulated depreciation and impairments	(42,955)		(46,597)
Owned assets, net	$	17,370	$	27,934

Total depreciation expense related to owned assets during the years ended March 31, 2020, 2021 and 2022 was $16.1 million, $12.9 million and $10.7 million, respectively. Depreciation expense related to in-vehicle devices is included in subscription cost of revenue.

The cost and accumulated depreciation of right-of-use assets are as follows (in thousands):

	As of March 31,
	2021		2022
Right-of-use assets
Property	$	8,348	$	7,019
Equipment, motor vehicles and other	226		305
Less: accumulated depreciation	(2,481)		(2,984)
Right-of-use assets, net	$	6,093	$	4,340