Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements Of Operations [Abstract]
Revenue	$ 21,852	$ 24,132	$ 44,260	$ 48,693
Cost of sales	11,491	13,091	23,639	26,995
Gross margin	10,361	11,041	20,621	21,698
Operating expenses:
Selling and administrative	10,744	10,800	20,758	21,491
Income (loss) from operations	(383)	241	(137)	207
Other income:
Interest income, net	105	111	215	203
Other income		122		124
Total other income	105	233	215	327
Income (loss) before income taxes	(278)	474	78	534
Provision (benefit) for income taxes	(17)	66	(60)	39
Net income (loss)	$ (261)	$ 408	$ 138	$ 495
Basic net income (loss) per share	$ (0.02)	$ 0.04	$ 0.01	$ 0.05
Diluted net income (loss) per share	$ (0.02)	$ 0.04	$ 0.01	$ 0.04
Shares used in per share calculations:
Basic	11,149	10,972	11,257	10,851
Diluted	11,149	11,460	11,423	11,325