Description of Business and Summary of Significant Accounting Policies - Acquisitions and Divestitures (Details) - USD ($)				12 Months Ended
	Dec. 07, 2020	May 05, 2020	Jun. 13, 2019	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	May 02, 2020
Significant accounting policies
Proceeds from issuance of common stock				$ 0	$ 0	$ 26,751,000
Stockholders of AGI
Significant accounting policies
Payments to acquire businesses, gross			$ 6,200,000
Underwritten Public Offering
Significant accounting policies
Issuance of common stock in connection with public offering, net of costs (in shares)			6,182,797
Proceeds from issuance of common stock			$ 26,800,000
Discontinued Operations, Held-for-sale | Agriculture and Weather Analytics Segment
Significant accounting policies
Disposal group, including discontinued operation, consideration		$ 12,000,000					$ 12,000,000
Net proceeds from sale of discontinued operation		10,500,000
Amount held in escrow from divestiture of business		1,500,000
Discontinued Operations, Held-for-sale | Agriculture and Weather Analytics Segment | Scenario One
Significant accounting policies
Amount receivable from divestiture of business		1,450,000
Discontinued Operations, Held-for-sale | Agriculture and Weather Analytics Segment | Scenario Two
Significant accounting policies
Amount receivable from divestiture of business		$ 50,000.00
TrafficCast International
Significant accounting policies
Consideration transferred	$ 17,731,000
Payments to acquire businesses, gross	15,000,000
Security hold back	1,000,000
Consideration transferred, liabilities incurred	1,131,000
Consideration transferred, cash paid	1,000,000.0
Contingent consideration	$ 600,000
Consideration transferred, earn out term				2 years