Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Revenue, net	$ 4,611	$ 5,009
Cost of goods sold	2,878	3,297
Gross profit	1,733	1,712
Operating expense:
Research and development	1,588	1,261
Selling, general and administrative	10,447	8,409
Restructuring	0	1,762
Total operating expense	12,035	11,432
Operating loss	(10,302)	(9,720)
Other income (expense), net:
Other expense	(184)	0
Other income	66	0
Interest expense	(1,584)	(6,585)
Change in fair value of derivatives	198	(593)
Total other income (expense), net	(1,504)	(7,178)
Loss before income taxes	(11,806)	(16,898)
Income tax expense	0	0
Net loss	(11,806)	(16,898)
Preferred stock dividend	(48)	0
Net loss attributable to common stockholders	$ (11,854)	$ (16,898)
Net loss per share of common shares outstanding - basic and diluted (usd per share)	$ (6.92)	$ (47.37)
Weighted average common shares outstanding - basic and diluted	1,706,036	356,758