Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
NET REVENUES:
Product	$ 25,460	$ 25,714	$ 78,286	$ 75,792
Other	6,791	4,147	14,413	11,545
Total revenue	32,251	29,861	92,699	87,337
COST OF PRODUCTS SOLD	9,576	9,192	28,626	28,974
Gross profit	22,675	20,669	64,073	58,363
OPERATING EXPENSES:
Research and development	3,196	2,525	8,547	8,961
Sales and marketing	6,428	9,677	22,531	26,465
General and administrative	6,907	6,931	19,803	18,971
Total operating expenses	16,531	19,133	50,881	54,397
Operating income	6,144	1,536	13,192	3,966
OTHER INCOME (EXPENSE)	498	81	(34)	395
Income before income taxes	6,642	1,617	13,158	4,361
INCOME TAX EXPENSE	400	147	634	810
NET INCOME	$ 6,242	$ 1,470	$ 12,524	$ 3,551
EARNINGS PER SHARE:
BASIC	$ 0.11	$ 0.03	$ 0.23	$ 0.06
DILUTED	$ 0.11	$ 0.03	$ 0.22	$ 0.06
SHARES USED IN COMPUTING EARNINGS PER SHARE:
BASIC	55,653	56,482	55,549	56,427
DILUTED	56,530	56,692	56,273	56,900