Composition of Certain Financial Statement Captions - Summary of Other Current and Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Mar. 31, 2018
Other Liabilities [Abstract]
Sales returns reserves and other customer liabilities	$ 8,171
Care services liabilities	7,331	$ 2,373
Accrued employee benefits and withholdings	3,250	1,636
Customer credit balances and deposits	3,044	4,287
Accrued self insurance expense	2,960	2,145
Accrued outsourcing costs	2,511	2,898
Accrued hosting costs	2,223	1,600
User group meeting deposits	2,141
Accrued EDI expense	2,062	2,310
Accrued consulting and outside services	2,005	4,428
Deferred rent	1,403	1,594
Accrued royalties	904	1,400
Accrued legal expense	750	1,793
Remaining lease obligations	602	672
Sales tax payable	485	499
Accrued securities litigation settlement		19,000
Other accrued expenses	4,041	1,682
Other current liabilities	43,883	48,317
Deferred rent	9,787	9,902
Uncertain tax positions	2,527	2,419
Remaining lease obligations	694	962
Other liabilities	246	211
Other noncurrent liabilities	$ 13,254	$ 13,494