Acquisitions - TrafficCast Purchase Price Allocation (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021	Dec. 17, 2020	Mar. 31, 2020
Purchased intangible assets
Goodwill	$ 28,340	$ 28,340		$ 20,590
TrafficCast International
Purchased intangible assets
Trade accounts receivable			$ 2,087
Unbilled accounts receivable			596
Inventories			941
Right-of-use assets			193
Property and equipment			233
Intangible assets			9,500
Goodwill			7,750
Other assets			242
Total assets acquired			21,542
Accounts payable			1,026
Deferred revenue			2,460
Lease liabilities			193
Other liabilities			132
Total liabilities assumed			3,811
Total purchase price			$ 17,731