Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Net sales	$ 19,897	$ 18,161	$ 38,844	$ 34,915
Cost of sales	6,767	5,785	12,597	11,315
Gross profit	13,130	12,376	26,247	23,600
Sales and marketing	5,519	5,537	11,376	11,766
General and administrative	3,303	3,296	6,921	6,611
Research and development	1,331	1,137	2,484	2,481
Restructuring charges		89	0	492
Impairment charges		161		161
Medical device excise tax	183	176	363	340
Total operating expenses	10,336	10,396	21,144	21,851
Income from operations	2,794	1,980	5,103	1,749
Other income (expense):
Interest income	4		4
Foreign currency gain (loss)	26	20	43	(22)
Income before income taxes	2,824	2,000	5,150	1,727
Provision for income taxes	1,057	728	2,014	662
Net income	$ 1,767	$ 1,272	$ 3,136	$ 1,065
Earnings per share of common stock:
Basic	$ 0.10	$ 0.08	$ 0.18	$ 0.07
Diluted	$ 0.10	$ 0.08	$ 0.17	$ 0.07
Weighted-average shares outstanding:
Basic	17,582	16,113	17,503	15,852
Diluted	18,065	16,545	17,930	16,290
Cash dividends declared per common share	$ 0.040	$ 0.035	$ 0.080	$ 0.070