Additional Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020
Accrued liabilities:
Salaries, wages, and related benefits	$ 6,811	$ 6,945
Other taxes payable	1,512	1,649
Severance liabilities	103	32
Professional fees	104	50
Other	271	357
Total	8,801	9,033
Other non-current liabilities:
Uncertain tax positions	1,110	1,103
Asset retirement obligations	170	170
Employee benefit obligations	1,429	511
Other	77	76
Total	$ 2,786	$ 1,860