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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 28, 2012
Dec. 30, 2011
Dec. 31, 2010
Net sales $ 63,783 $ 62,765 $ 54,958
Cost of sales 19,492 20,396 19,882
Gross profit 44,291 42,369 35,076
Selling, general and administrative expenses:      
General and administrative 15,150 14,932 14,778
Marketing and selling 21,281 17,726 17,176
Research and development 6,444 5,868 5,724
Other general and administrative expenses 2,636 1,060 0
Operating income (loss) (1,220) 2,783 (2,602)
Other income (expense):      
Interest income 59 32 43
Interest expense (291) (523) (896)
Gain (loss) on foreign currency transactions 111 86 (87)
Loss on early extinguishment of note payable 0 0 (267)
Other income, net 822 326 128
Other income (expense), net 701 (79) (1,079)
Income (loss) before provision for income taxes (519) 2,704 (3,681)
Provision for income taxes 1,244 1,356 432
Income (loss) from continuing operations (1,763) 1,348 (4,113)
Income from discontinued operations, net of income taxes 0 0 4,166
Net income (loss) $ (1,763) $ 1,348 $ 53
Income (loss) per share from continuing operations - basic (in dollors per share) $ (0.05) $ 0.04 $ (0.12)
Income (loss) per share from continuing operations - diluted (in dollors per share) $ (0.05) $ 0.04 $ (0.12)
Income per share from discontinued operations - basic and diluted (in dollors per share) $ 0 $ 0 $ 0.12
Net income (loss) per share - basic (in dollors per share) $ (0.05) $ 0.04 $ 0.00
Net income (loss) per share - diluted (in dollors per share) $ (0.05) $ 0.04 $ 0.00
Weighted average shares outstanding - basic (in shares) 36,253 35,434 34,825
Weighted average shares outstanding - diluted (in shares) 36,253 36,878 34,825