CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Product sales	$ 10,929	$ 11,309	$ 37,860	$ 35,748
Total revenues	10,929	11,309	37,860	35,748
Costs and expenses:
Cost of product sales	6,856	6,772	20,716	19,241
Gross profit	4,073	4,537	17,144	16,507
Research and development	3,443	3,740	11,037	11,486
Selling, general and administrative	7,010	5,674	19,463	16,735
Total operating expenses	10,453	9,414	30,500	28,221
Loss from operations	(6,380)	(4,877)	(13,356)	(11,714)
Other income (expense):
Decrease (increase) in fair value of warrants	(203)	461	99	256
Foreign currency translation (loss) gain	(6)	(5)	(17)	5
Interest income	0	7	7	29
Interest expense	(86)	(2)	(92)	(6)
Other (income) expense	0	0	(10)	0
Total other income (expense)	(295)	461	(13)	284
Net loss	$ (6,675)	$ (4,416)	$ (13,369)	$ (11,430)
Net loss per share attributable to common shareholders (Basic and Diluted) (see note 11)	$ (0.38)	$ (0.26)	$ (0.84)	$ (0.69)
Weighted average number of common shares outstanding (Basic and Diluted)	22,744	23,788	22,678	23,786