Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue:
Products	$ 24,934	$ 26,708	$ 49,052	$ 54,662
Support, maintenance and subscription services	19,506	17,904	37,942	35,429
Professional services	9,806	8,073	18,898	15,185
Gross profit	22,081	20,999	42,459	39,087
Operating income (loss)	(539)	(5,830)	(2,089)	(14,192)
Other Charges:
Asset impairments and related charges	0	0	208	0
Restructuring, severance and other charges	430	3,688	1,555	6,034
HSG [Member]
Revenue:
Products	7,281	7,235	13,836	11,781
Support, maintenance and subscription services	12,963	11,411	25,356	23,048
Professional services	3,989	3,630	7,429	6,981
Elimination of intersegment sales	0	0	30	0
Revenue from external customers	24,233	22,276	46,591	41,810
Gross profit	15,857	14,233	30,522	26,230
Gross profit margin	65.40%	63.90%	65.50%	62.70%
Operating income (loss)	3,212	1,189	6,256	211
Interest expense, net	0	0	0	0
Other income, net	0	0	0	0
Income (loss) from continuing operations before income taxes	3,212	1,189	6,256	211
Other Charges:
Depreciation and amortization	661	649	1,325	1,238
Asset impairments and related charges			208
Restructuring, severance and other charges	322	619	915	806
RSG [Member]
Revenue:
Products	17,653	19,473	35,216	42,881
Support, maintenance and subscription services	6,799	6,709	13,066	12,776
Professional services	5,812	4,443	11,494	8,204
Elimination of intersegment sales	251	216	475	395
Revenue from external customers	30,013	30,409	59,301	63,466
Gross profit	6,224	6,766	11,937	12,857
Gross profit margin	20.70%	22.20%	20.10%	20.30%
Operating income (loss)	2,124	1,921	3,842	3,730
Interest expense, net	0	0	0	0
Other income, net	0	0	0	0
Income (loss) from continuing operations before income taxes	2,124	1,921	3,842	3,730
Other Charges:
Depreciation and amortization	170	154	310	304
Asset impairments and related charges			0
Restructuring, severance and other charges	0	231	0	365
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)	(5,875)	(8,940)	(12,187)	(18,133)
Interest expense, net	14	522	161	827
Other income, net	(161)	308	(18)	271
Income (loss) from continuing operations before income taxes	(5,728)	(9,770)	(12,330)	(19,231)
Other Charges:
Depreciation and amortization	702	1,236	1,478	2,440
Asset impairments and related charges			0
Restructuring, severance and other charges	108	2,838	640	4,863
Consolidated Entities [Member]
Revenue:
Products	24,934	26,708	49,052	54,662
Support, maintenance and subscription services	19,762	18,120	38,422	35,824
Professional services	9,801	8,073	18,923	15,185
Elimination of intersegment sales	251	216	505	395
Revenue from external customers	54,246	52,685	105,892	105,276
Gross profit	22,081	20,999	42,459	39,087
Gross profit margin	40.70%	39.90%	40.10%	37.10%
Operating income (loss)	(539)	(5,830)	(2,089)	(14,192)
Interest expense, net	14	522	161	827
Other income, net	(161)	308	(18)	271
Income (loss) from continuing operations before income taxes	(392)	(6,660)	(2,232)	(15,290)
Other Charges:
Depreciation and amortization	1,533	2,039	3,113	3,982
Asset impairments and related charges			208
Restructuring, severance and other charges	$ 430	$ 3,688	$ 1,555	$ 6,034