Consolidated Statements of Earnings (unaudited) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net revenue:
Product revenue	$ 34,441,000	$ 29,845,000
License, royalty and collaboration revenue	170,000	62,000
Total revenue	34,611,000	29,907,000
Product costs and operating expenses:
Cost of goods sold	11,296,000	9,583,000
Collaboration expenses	54,000	11,000
Research and development	4,067,000	3,290,000
Clinical and regulatory	1,481,000	1,300,000
Sales and marketing	8,732,000	7,736,000
General and administrative	4,777,000	2,859,000
Medical device excise taxes	376,000	345,000
Amortization of purchased technology and intangibles	405,000	412,000
Total product costs and operating expenses	31,188,000	25,536,000
Operating earnings	3,423,000	4,371,000
Other earnings	28,000	2,000
Earnings before income taxes	3,451,000	4,373,000
Income tax expense	(1,244,000)	(1,574,000)
Net earnings	$ 2,207,000	$ 2,799,000
Net earnings per share - basic (in dollars per share)	$ 0.13	$ 0.17
Net earnings per share - diluted (in dollars per share)	$ 0.12	$ 0.16