Consolidated Statements of Operations and Comprehensive Loss (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Sales	$ 1,431	$ 2,115
Operating Expenses
Cost of goods sold	4,810	4,420
Research and development	12,700	6,283
Sales and marketing	1,943	3,723
General and administrative	4,221	2,763
Loss on disposal of property and equipment	450	0
Merger expenses	2,911	0
Total Operating Expenses	27,035	17,189
Operating Loss	(25,604)	(15,074)
Other (Expense) Income
Remeasurement of fair value of preferred stock warrant liability	(1,800)	0
Interest expense, net	(954)	(351)
Total Other (Expense) Income, net	(2,754)	(351)
Net Loss	(28,358)	(15,425)
Other comprehensive income (loss)	0	0
Comprehensive loss	$ (28,358)	$ (15,425)
Net loss per share - basic and diluted (in dollars per share)	$ (0.45)	$ (2.86)
Weighted average common shares outstanding - basic and diluted (in shares)	63,655	5,391