Additional Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Accrued liabilities:
Salaries, wages, and related benefits	$ 10,483	$ 6,793
Other taxes payable	1,120	769
Restructuring liabilities	20	198
Severance liabilities	33	0
Professional fees	143	288
Deferred rent	430	407
Other	643	786
Total	12,872	9,241
Other non-current liabilities:
Uncertain tax positions	1,342	1,519
Deferred rent	2,060	2,313
Other	77	79
Total	$ 3,479	$ 3,911