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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Revenue:    
Hardware product $ 43,173 $ 48,247
Service 2,002 2,012
Total revenue 45,175 50,259
Cost of sales:    
Cost of hardware product 22,438 24,710
Cost of service 1,284 1,192
Total cost of sales 23,722 25,902
Gross profit 21,453 24,357
Operating expenses:    
Sales and marketing 8,322 8,518
Research and development 6,905 7,838
General and administrative 3,804 4,061
Restructuring charge 0 651
Total operating expenses 19,031 21,068
Operating income 2,422 3,289
Other income, net:    
Interest income 159 108
Interest expense (33) (8)
Other income, net 574 123
Total other income, net 700 223
Income from continuing operations, before income taxes 3,122 3,512
Income tax provision 765 381
Income continuing operations 2,357 3,131
Income from discontinued operations, after income taxes 0 3,319
Net income $ 2,357 $ 6,450
Basic net income per common share:    
Continuing operations, basic (USD per share) $ 0.09 $ 0.12
Discontinued operations, basic (USD per share) 0.00 0.13
Net income, basic (USD per share) 0.09 0.25
Diluted net income per common share    
Continuing operations, diluted (USD per share) 0.09 0.12
Discontinued operations, diluted (USD per share) 0.00 0.13
Net income, diluted (USD per share) $ 0.09 $ 0.25
Weighted average common shares:    
Basic (shares) 26,175 25,331
Diluted (shares) 26,972 26,171