Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Revenue:
Hardware product	$ 195,497	$ 172,846	$ 173,078
Service	17,361	19,855	22,303
Total revenue	212,858	192,701	195,381
Cost of sales:
Cost of hardware product	101,155	85,737	82,276
Cost of service	13,672	16,480	12,982
Total cost of sales	114,827	102,217	95,258
Gross profit	98,031	90,484	100,123
Operating expenses:
Sales and marketing	39,544	40,576	40,513
Research and development	32,047	29,789	30,327
General and administrative	19,514	19,913	21,423
Restructuring charges, net	509	81	313
Total operating expenses	91,614	90,359	92,576
Operating income	6,417	125	7,547
Other income, net:
Interest income	218	176	210
Interest expense	(4)	(5)	(42)
Other income, net	2,014	501	523
Total other income, net	2,228	672	691
Income before income taxes	8,645	797	8,238
Income tax provision (benefit)	2,057	(954)	2,433
Net income	$ 6,588	$ 1,751	$ 5,805
Net income per common share:
Basic (USD per share)	$ 0.27	$ 0.07	$ 0.22
Diluted (USD per share)	$ 0.26	$ 0.07	$ 0.22
Weighted average common shares:
Basic (shares)	24,645	25,345	25,956
Diluted (shares)	25,227	25,730	26,237