Consolidated Statements of Operations and Comprehensive Loss (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Consolidated Statements Of Operations and Comprehensive Income [Abstract]
Sales	$ 93	$ 329
Operating Expenses
Cost of goods sold	220	882
Research and development	5,011	2,781
Sales and marketing	406	512
General and administrative	1,614	685
Total Operating Expenses	7,251	4,860
Operating Loss	(7,158)	(4,531)
Other Expense
Interest expense, net	(321)	(246)
Total Other Expense, net	(321)	(246)
Net Loss	(7,479)	(4,777)
Other comprehensive income (loss)
Comprehensive loss	$ (7,479)	$ (4,777)
Net loss per share - basic and diluted	$ (0.15)	$ (4.43)
Weighted average common shares outstanding - basic and diluted	48,850	1,078