Discontinued Operations - Gain recorded on sale (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	May 05, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred payments of purchase price				$ 0	$ 1,500
Held for sale | Agriculture and Weather Analytics segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Initial proceeds from sale, net of transaction costs	$ 9,440
Closing working capital adjustment	250
Deferred payments of purchase price	1,500
Total consideration, net of transaction costs	11,190
Trade accounts receivable, net of allowance for doubtful accounts	1,060
Unbilled accounts receivable	488
Other classes of assets that are not major	194
Total assets of discontinued operations	1,742					$ 78
Trade accounts payable	349
Deferred revenue	1,518
Total liabilities of discontinued operations	1,867					$ 355
Gain on disposal of discontinued operations before income tax	$ 11,315	$ 0	$ 0	$ 0	$ 11,315