Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Revenue:
Products	$ 40,210	$ 25,725	$ 89,262	$ 80,387
Support, maintenance and subscription services	19,405	18,275	57,347	53,704
Professional services	7,596	7,582	26,494	22,767
Gross profit	23,449	19,933	65,908	59,020
Operating income (loss)	811	(7,049)	(1,278)	(21,241)
Other Charges:
Asset impairments and related charges	0	0	208	0
Restructuring, severance and other charges	(31)	4,556	1,524	10,590
HSG [Member]
Revenue:
Products	12,251	6,618	26,087	18,399
Support, maintenance and subscription services	12,461	12,243	37,817	35,291
Professional services	3,478	2,819	10,907	9,800
Elimination of intersegment sales	0	0	30	0
Revenue from external customers	28,190	21,680	74,781	63,490
Gross profit	16,168	13,957	46,690	40,187
Gross profit margin	57.40%	64.40%	62.40%	63.30%
Operating income (loss)	3,998	1,864	10,254	2,075
Interest expense, net	0	0	0	0
Other income, net	0	0	0	0
Income (loss) from continuing operations before income taxes	3,998	1,864	10,254	2,075
Other Charges:
Depreciation and amortization	665	693	1,989	1,931
Asset impairments and related charges			208
Restructuring, severance and other charges	6	11	921	817
RSG [Member]
Revenue:
Products	27,959	19,107	63,175	61,988
Support, maintenance and subscription services	7,171	6,257	20,237	19,033
Professional services	4,128	4,763	15,622	12,967
Elimination of intersegment sales	237	225	712	620
Revenue from external customers	39,021	29,902	98,322	93,368
Gross profit	7,281	5,976	19,218	18,833
Gross profit margin	18.70%	20.00%	19.50%	20.20%
Operating income (loss)	3,020	1,439	6,862	5,169
Interest expense, net	0	0	0	0
Other income, net	0	0	0	0
Income (loss) from continuing operations before income taxes	3,020	1,439	6,862	5,169
Other Charges:
Depreciation and amortization	150	153	461	457
Asset impairments and related charges			0
Restructuring, severance and other charges	0	16	0	381
Corporate/Other [Member]
Revenue:
Products	0	0	0	0
Support, maintenance and subscription services	0	0	0	0
Professional services	0	0	0	0
Elimination of intersegment sales	0	0	0	0
Revenue from external customers	0	0	0	0
Gross profit	0	0	0
Operating income (loss)	(6,207)	(10,352)	(18,394)	(28,485)
Interest expense, net	56	56	217	883
Other income, net	220	22	202	293
Income (loss) from continuing operations before income taxes	(6,483)	(10,430)	(18,813)	(29,661)
Other Charges:
Depreciation and amortization	650	1,131	2,128	3,571
Asset impairments and related charges			0
Restructuring, severance and other charges	(37)	4,529	603	9,392
Consolidated Entities [Member]
Revenue:
Products	40,210	25,725	89,262	80,387
Support, maintenance and subscription services	19,632	18,500	58,054	54,324
Professional services	7,606	7,582	26,529	22,767
Elimination of intersegment sales	237	225	742	620
Revenue from external customers	67,211	51,582	173,103	156,858
Gross profit	23,449	19,933	65,908	59,020
Gross profit margin	34.90%	38.60%	38.10%	37.60%
Operating income (loss)	811	(7,049)	(1,278)	(21,241)
Interest expense, net	56	56	217	883
Other income, net	220	22	202	293
Income (loss) from continuing operations before income taxes	535	(7,127)	(1,697)	(22,417)
Other Charges:
Depreciation and amortization	1,465	1,977	4,578	5,959
Asset impairments and related charges			208
Restructuring, severance and other charges	$ (31)	$ 4,556	$ 1,524	$ 10,590