CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 03, 2014	Sep. 27, 2013	Oct. 03, 2014	Sep. 27, 2013
Net sales	$ 18,188	$ 17,106	$ 58,414	$ 53,271
Cost of sales	6,319	5,047	18,995	15,939
Gross profit	11,869	12,059	39,419	37,332
General and administrative	3,250	4,140	13,968	12,021
Marketing and selling	7,026	5,527	20,189	16,471
Research and development	3,137	1,684	9,118	4,736
Medical device tax	9	45	96	149
Other general and administrative expenses	0	490	334	2,004
Operating income (loss)	(1,553)	173	(4,286)	1,951
Other income (expense):
Interest income	7	9	26	23
Interest expense	(35)	(38)	(102)	(134)
Gain (loss) on foreign currency transactions	(628)	226	(696)	(38)
Other income, net	51	130	338	360
Other income (expense), net	(605)	327	(434)	211
Income (loss) before provision (benefit) for income taxes	(2,158)	500	(4,720)	2,162
Provision (benefit) for income taxes	548	(25)	1,134	888
Net income (loss)	$ (2,706)	$ 525	$ (5,854)	$ 1,274
Net income (loss) per share - basic (in dollars per share)	$ (0.07)	$ 0.01	$ (0.15)	$ 0.03
Net income (loss) per share - diluted (in dollars per share)	$ (0.07)	$ 0.01	$ (0.15)	$ 0.03
Weighted average shares outstanding - basic (in shares)	38,369	36,750	38,044	36,552
Weighted average shares outstanding - diluted (in shares)	38,369	39,284	38,044	38,482