CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:
Product sales	$ 29,542	$ 41,693	$ 108,683	$ 150,381
Services	6,069	4,200	15,980	10,793
Clinic services	18,092	0	31,235	0
Total revenues	53,703	45,893	155,898	161,174
Cost of revenues:
Product sales	6,846	7,345	22,328	27,513
Services	1,869	1,721	5,501	4,809
Clinic services	14,246	0	23,129	0
Total cost of revenues	22,961	9,066	50,958	32,322
Gross profit	30,742	36,827	104,940	128,852
Operating expenses:
Engineering and product development	821	805	2,339	2,392
Selling and marketing	28,840	30,973	90,886	90,767
General and administrative	11,678	5,972	30,717	17,899
Total operating expenses	41,339	37,750	123,942	111,058
Operating (loss) profit	(10,597)	(923)	(19,002)	17,794
Other (loss) income:
Interest and other financing (expense) income, net	(3,824)	473	(4,145)	470
(Loss) Income before income tax benefit (expense)	(14,421)	(450)	(23,147)	18,264
Income tax (expense) benefit	(522)	1,336	379	(3,072)
Net (loss) income	(14,943)	886	(22,768)	15,192
Net (loss) income per share:
Basic (in dollars per share)	$ (0.80)	$ 0.04	$ (1.22)	$ 0.74
Diluted (in dollars per share)	$ (0.80)	$ 0.04	$ (1.22)	$ 0.72
Shares used in computing net (loss) income per share:
Basic (in shares)	18,724,419	19,982,967	18,722,459	20,518,493
Diluted (in shares)	18,724,419	20,441,262	18,722,459	20,976,788
Other comprehensive (loss) income :
Foreign currency translation adjustments	(1,678)	1,884	(649)	92
Comprehensive (loss) income	$ (16,621)	$ 2,770	$ (23,417)	$ 15,284