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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Revenue:      
Hardware product $ 196,101 $ 195,497 $ 172,846
Service 6,904 8,350 10,327
Total revenue 203,005 203,847 183,173
Cost of sales:      
Cost of hardware product 98,265 101,155 85,737
Cost of service 5,060 5,571 7,059
Total cost of sales 103,325 106,726 92,796
Gross profit 99,680 97,121 90,377
Operating expenses:      
Sales and marketing 33,847 37,574 38,751
Research and development 30,955 29,949 28,912
General and administrative 17,026 18,306 18,244
Restructuring charges, net 747 403 81
Total operating expenses 82,575 86,232 85,988
Operating income 17,105 10,889 4,389
Other (expense) income, net:      
Interest income 545 218 176
Interest expense (291) (4) (5)
Other (expense) income, net (669) 2,014 501
Total other (expense) income, net (415) 2,228 672
Income from continuing operations, before income taxes 16,690 13,117 5,061
Income tax provision 3,212 3,684 568
Income from continuing operations 13,478 9,433 4,493
Income (loss) from discontinued operations, after income taxes 3,230 (2,845) (2,742)
Net income $ 16,708 $ 6,588 $ 1,751
Basic net income (loss) per common share:      
Continuing operations $ 0.52 $ 0.38 $ 0.18
Discontinued operations 0.13 (0.12) (0.11)
Net income (1) [1] 0.65 0.27 0.07
Diluted net income (loss) per common share:      
Continuing operations 0.51 0.37 0.17
Discontinued operations 0.12 (0.11) (0.11)
Net income (1) [1] $ 0.64 $ 0.26 $ 0.07
Weighted average common shares:      
Basic (shares) 25,760 24,645 25,345
Diluted (shares) 26,311 25,227 25,730
[1] Earnings per share presented are calculated by line item and may not add due to the use of rounded amounts.