Discontinued Operations - Results of operations included in net income (loss) from discontinued operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating expenses:
Other (expense) income, net	$ (44)	$ 115	$ (28)	$ 107
Income tax	(47)	0	(47)	0
Gain on disposal of discontinued operations after income tax	0	0	11,288	0
Net (loss) income from discontinued operations, net of tax	(306)	(1,136)	9,624	(2,171)
Held for sale | Agriculture and Weather Analytics segment
Results of discontinued operations
Service revenue	0	1,295	695	2,736
Cost of service revenues	0	590	349	1,207
Gross profit	0	705	346	1,529
Operating expenses:
Selling, general and administration	230	839	746	1,772
Research and development	0	1,002	407	1,928
Restructuring charges	0	0	837	0
Total operating expenses	230	1,841	1,990	3,700
Operating loss from discontinued operations	(230)	(1,136)	(1,644)	(2,171)
Other (expense) income, net	(29)	0	27	0
Loss from discontinued operation before income tax	(259)	(1,136)	(1,617)	(2,171)
Net loss from discontinued operations	(306)	(1,136)	(1,664)	(2,171)
Gain on disposal of discontinued operations before income tax	0	0	11,315	0
Income tax expense on gain on disposal	0	0	(27)	0
Gain on disposal of discontinued operations after income tax	0	0	11,288	0
Net (loss) income from discontinued operations, net of tax	$ (306)	$ (1,136)	$ 9,624	$ (2,171)