Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net sales:
Products	$ 27,094	$ 24,664	$ 55,879	$ 48,156
Services	26,494	24,662	51,595	47,957
Total net sales	53,588	49,326	107,474	96,113
Cost of goods sold:
Products	20,605	19,721	43,966	36,549
Services	11,367	11,843	22,365	22,844
Total cost of goods sold	31,972	31,564	66,331	59,393
Gross margin	21,616	17,762	41,143	36,720
Operating expenses:
Selling, general, and administrative expenses	24,460	24,347	48,563	47,450
Asset impairment charges		59		59
Restructuring charges	2,370	10	4,716	403
Operating loss	(5,214)	(6,654)	(12,136)	(11,192)
Other expenses (income):
Other expenses (income), net	308	(856)	271	(1,959)
Interest income	(17)	(17)	(49)	(40)
Interest expense	539	278	877	563
Loss from continuing operations before income taxes	(6,044)	(6,059)	(13,235)	(9,756)
Income tax (benefit) expense	(2,806)	(1,143)	(4,557)	3,452
Loss from continuing operations	(3,238)	(4,916)	(8,678)	(13,208)
Income from discontinued operations, net of taxes	(10,487)	(2,702)	(11,138)	(742)
Net income (loss)	$ 7,249	$ (2,214)	$ 2,460	$ (12,466)
(Loss) income per share - basic and diluted:
Loss from continuing operations	$ (0.14)	$ (0.22)	$ (0.38)	$ (0.58)
Income from discontinued operations	$ 0.46	$ 0.12	$ 0.49	$ 0.03
Net income (loss)	$ 0.32	$ (0.10)	$ 0.11	$ (0.55)
Weighted average shares outstanding:
Basic and diluted	22,853,057	22,750,474	22,902,872	22,750,254