GEOGRAPHICAL INFORMATION - Long-lived Assets by Geographic Areas (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Total tangible long-lived assets, net	$ 33,217	$ 29,428
United States
Segment Reporting Information [Line Items]
Total tangible long-lived assets, net	19,086	4,393
Foreign
Segment Reporting Information [Line Items]
Total tangible long-lived assets, net	14,131	25,035
Mexico
Segment Reporting Information [Line Items]
Total tangible long-lived assets, net	1,845	2,681
Netherlands
Segment Reporting Information [Line Items]
Total tangible long-lived assets, net	4,778	5,541
China
Segment Reporting Information [Line Items]
Total tangible long-lived assets, net	0	16,808
Estonia
Segment Reporting Information [Line Items]
Total tangible long-lived assets, net	7,408	0
Other
Segment Reporting Information [Line Items]
Total tangible long-lived assets, net	$ 100	$ 5