Composition of Certain Financial Statement Captions - Summary of Other Current and Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Other Liabilities [Abstract]
Sales returns reserves and other customer liabilities	$ 7,777
Care services liabilities	7,389	$ 2,373
Customer credit balances and deposits	3,879	4,287
Accrued hosting costs	3,775	1,600
Accrued employee benefits and withholdings	2,777	1,636
Accrued self insurance expense	2,416	2,145
Accrued consulting and outside services	2,278	4,428
Accrued EDI expense	1,982	2,310
Accrued outsourcing costs	1,759	2,898
Deferred rent	1,389	1,594
Accrued royalties	917	1,400
Sales tax payable	539	499
Remaining lease obligations	524	672
Accrued legal expense	293	1,793
Accrued securities litigation settlement		19,000
Other accrued expenses	3,916	1,682
Other current liabilities	41,610	48,317
Deferred rent	9,427	9,902
Uncertain tax positions	2,690	2,419
Remaining lease obligations	607	962
Other liabilities	189	211
Other noncurrent liabilities	$ 12,913	$ 13,494