Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Condensed Statements of Operations
Net sales	$ 1,471	$ 12,434
Cost of goods sold	760	3,237
Gross profit	711	9,197
Operating expenses:
Sales and marketing	5,109	6,854
Research and development	2,255	1,256
General and administrative	5,286	3,721
Total operating expenses	12,650	11,831
Loss from operations	(11,939)	(2,634)
Other income (expense), net:
Interest income	15
Interest expense	(1)	(668)
Other expense, net	(12)	(82)
Total other income (expense), net	2	(750)
Loss before income taxes	(11,937)	(3,384)
Net loss	$ (11,937)	$ (3,384)
Basic and diluted net loss per share attributable to common stockholders (in dollars per share)	$ (0.66)	$ (0.23)
Weighted average outstanding common shares used for net loss per share attributable to common stockholders:
Basic and diluted (in shares)	18,050,597	14,923,136