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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Consolidated Statements of Operations    
Net sales $ 34,503 $ 33,977
Cost of sales 26,776 25,339
Gross profit 7,727 8,638
Selling, general, and administrative expenses 5,904 6,024
Restructuring costs 123 78
Gain on sale fixed assets (4) (31)
Operating income 1,704 2,567
Other expenses:    
Interest (income) expense, net (11) 24
Income before income tax provision 1,715 2,543
Income tax expense 640 890
Net income $ 1,075 $ 1,653
Net income per share:    
Basic (in dollars per share) $ 0.15 $ 0.23
Diluted (in dollars per share) $ 0.15 $ 0.23
Weighted average common shares outstanding:    
Basic (in shares) 7,173 7,076
Diluted (in shares) 7,255 7,193