Summary of Significant Accounting Policies - Segment Reporting - Geographic Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Geographic revenue information
Total Revenue	$ 68,926	$ 83,412
Total North America
Geographic revenue information
Total Revenue	34,588	51,276
United States
Geographic revenue information
Total Revenue	31,082	45,480
Mexico
Geographic revenue information
Total Revenue	2,361	5,005
All other North America
Geographic revenue information
Total Revenue	1,145	791
Total Europe
Geographic revenue information
Total Revenue	16,511	16,062
Russia
Geographic revenue information
Total Revenue	3,653	3,176
All other Europe
Geographic revenue information
Total Revenue	12,858	12,886
Asia
Geographic revenue information
Total Revenue	4,074	5,229
Australia
Geographic revenue information
Total Revenue	4,559	3,874
All other
Geographic revenue information
Total Revenue	$ 9,194	$ 6,971