Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Net sales
Hardware product	$ 173,078	$ 180,434	$ 193,113
Service	22,303	10,124	11,047
Total revenue	195,381	190,558	204,160
Cost of sales:
Cost of hardware product	82,276	84,714	92,897
Cost of service	12,982	5,507	4,675
Total cost of sales	95,258	90,221	97,572
Gross profit	100,123	100,337	106,588
Operating expenses:
Sales and marketing	40,513	39,242	39,549
Research and development	30,327	30,767	31,642
General and administrative	21,423	18,188	18,206
Restructuring charges, net	313	1,259	154
Total operating expenses	92,576	89,456	89,551
Operating income	7,547	10,881	17,037
Other income (expense), net:
Interest income	210	289	251
Interest expense	(42)	(23)	(86)
Other income (expense), net	523	(250)	(687)
Total other income (expense), net	691	16	(522)
Income before income taxes	8,238	10,897	16,515
Income tax provision	2,433	3,282	5,496
Net income	$ 5,805	$ 7,615	$ 11,019
Net income per common share:
Basic (USD per share)	$ 0.22	$ 0.30	$ 0.44
Diluted (USD per share)	$ 0.22	$ 0.29	$ 0.43
Weighted average common shares:
Basic (shares)	25,956	25,743	25,312
Diluted (shares)	26,237	26,146	25,819