Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Net sales:
Products	$ 25,721	$ 33,970	$ 80,371	$ 81,653
Services	25,861	25,027	76,487	74,072
Total net sales	51,582	58,997	156,858	155,725
Cost of goods sold:
Products	20,109	26,777	63,536	63,326
Services	11,541	13,079	34,302	36,538
Total cost of goods sold	31,650	39,856	97,838	99,864
Gross margin	19,932	19,141	59,020	55,861
Operating expenses:
Selling, general, and administrative expenses	23,743	24,401	72,307	71,851
Asset impairment charges				59
Restructuring charges	3,238	3	7,954	406
Operating loss	(7,049)	(5,263)	(21,241)	(16,455)
Other expenses (income):
Other expenses (income), net	22	(321)	293	(2,281)
Interest income	(4)	(21)	(54)	(61)
Interest expense	60	316	937	880
Loss from continuing operations before income taxes	(7,127)	(5,237)	(22,417)	(14,993)
Income tax (benefit) expense	(1,353)	(2,947)	(6,209)	505
Loss from continuing operations	(5,774)	(2,290)	(16,208)	(15,498)
(Loss ) income from discontinued operations, net of taxes	(735)	4,288	10,403	5,030
Net (loss) income	$ (6,509)	$ 1,998	$ (5,805)	$ (10,468)
(Loss) income per share - basic and diluted:
Loss from continuing operations	$ (0.26)	$ (0.10)	$ (0.72)	$ (0.68)
(Loss) income from discontinued operations	$ (0.03)	$ 0.19	$ 0.46	$ 0.22
Net (loss) income	$ (0.29)	$ 0.09	$ (0.26)	$ (0.46)
Weighted average shares outstanding:
Basic and diluted	22,147,867	22,752,632	22,650,289	22,751,042