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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 29, 2012
Jul. 01, 2011
Jun. 29, 2012
Jul. 01, 2011
Net sales $ 15,942 $ 16,269 $ 31,451 $ 31,118
Cost of sales 4,897 5,408 9,504 10,628
Gross profit 11,045 10,861 21,947 20,490
General and administrative 3,633 3,905 7,493 7,303
Marketing and selling 5,366 4,200 10,029 8,659
Research and development 1,513 1,393 3,059 2,825
Other general and administrative expenses 697 193 1,252 325
Operating (loss) income (164) 1,170 114 1,378
Other income (expense):        
Interest income 7 5 7 18
Interest expense (67) (153) (162) (306)
Gain (loss) on foreign currency transactions (249) 72 (182) 444
Other income, net 309 236 523 399
Other income, net 0 160 186 555
(Loss) income before provision for income taxes (164) 1,330 300 1,933
Provision for income taxes 327 469 559 772
Net (loss) income $ (491) $ 861 $ (259) $ 1,161
Net (loss) income per share - basic (in dollars per share) $ (0.01) $ 0.02 $ (0.01) $ 0.03
Net (loss) income per share - diluted (in dollars per share) $ (0.01) $ 0.02 $ (0.01) $ 0.03
Weighted average shares outstanding - basic (in shares) 36,257 35,443 36,164 35,316
Weighted average shares outstanding - diluted (in shares) 36,257 36,439 36,164 36,389