CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Product sales, net	$ 16,953	$ 12,823	$ 26,314	$ 26,931
Cost of product sales	7,670	7,300	14,779	13,860
Gross profit	9,283	5,523	11,535	13,071
Research and development	2,971	4,058	6,438	7,594
Selling, general and administrative	8,833	6,449	17,241	12,453
Total operating expenses	11,804	10,507	23,679	20,047
Loss from operations	(2,521)	(4,984)	(12,144)	(6,976)
Other income (expense):
Decrease in fair value of warrants	441	1,942	548	302
Foreign currency translation loss	(13)	(1)	(14)	(11)
Interest income	3	2	4	7
Interest expense	(299)	(3)	(561)	(6)
Other income (expense)	1	0	1	(10)
Total other income (expense)	133	1,940	(22)	282
Net loss	$ (2,388)	$ (3,044)	$ (12,166)	$ (6,694)
Net loss per share attributable to common shareholders (Basic and Diluted) (see note 12) (in dollars per share)	$ (0.07)	$ (0.22)	$ (0.38)	$ (0.46)
Weighted average number of common shares outstanding (Basic and Diluted) (in shares)	32,765	22,684	32,333	22,644