CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Product sales, net	$ 9,361	$ 14,108
Cost of product sales	7,109	6,560
Gross profit	2,252	7,548
Research and development	3,467	3,536
Selling, general and administrative	8,408	6,004
Total operating expenses	11,875	9,540
Loss from operations	(9,623)	(1,992)
Other income (expense):
Decrease (increase) in fair value of warrants	107	(1,640)
Foreign currency translation loss	(1)	(10)
Interest income	1	5
Interest expense	(262)	(3)
Other expense	0	(10)
Total other income (expense)	(155)	(1,658)
Net loss	$ (9,778)	$ (3,650)
Net loss per share attributable to common shareholders (Basic and Diluted) (see note 11) (in dollars per share)	$ (0.31)	$ (0.24)
Weighted average number of common shares outstanding (Basic and Diluted) (in shares)	31,896	22,604