Revenue Recognition - Financial Statement Impact of Adoption (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Apr. 01, 2018	Mar. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Capitalized Contract Cost, Amortization	$ 300		$ 800
Net revenue	36,014	$ 31,310	104,224	$ 95,305
Sales and marketing	5,217	4,278	14,363	13,616
Accounts receivable, net	33,640		33,640		$ 19,513	$ 16,389
Contract assets	4,221		4,221		4,583	0
Prepaid expenses and other current assets	4,334		4,334		5,097	5,593
Other non-current assets	5,515		5,515		4,893	2,484
Contract liabilities	39,935		39,935		33,826	26,820
Retained earnings	96,640		96,640		106,215	103,601
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	(4,048)	(1,934)	(9,575)	(8,138)
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	36,146		104,327
Sales and marketing	5,351		14,606
Accounts receivable, net	23,801		23,801			16,389
Contract assets	0		0			0
Prepaid expenses and other current assets	4,751		4,751			5,593
Other non-current assets	2,860		2,860			2,484
Contract liabilities	26,391		26,391			26,820
Retained earnings	93,886		93,886			$ 103,601
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	(4,050)		(9,715)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	(132)		(103)
Sales and marketing	(134)		(243)
Accounts receivable, net	9,839		9,839		3,124
Contract assets	4,221		4,221		4,583
Prepaid expenses and other current assets	(417)		(417)		(496)
Other non-current assets	2,655		2,655		2,409
Contract liabilities	13,544		13,544		7,006
Retained earnings	2,754		2,754		$ 2,614
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	(2)		(140)
Products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	10,232	8,156	28,081	25,758
Products | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	9,889		26,982
Products | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	343		1,099
Support, maintenance and subscription services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	19,345	17,215	56,130	50,990
Support, maintenance and subscription services | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	19,558		56,752
Support, maintenance and subscription services | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	(213)		(622)
Professional services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	6,437	$ 5,939	20,013	$ 18,557
Professional services | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	6,699		20,593
Professional services | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	$ (262)		$ (580)