Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Condensed Consolidated Statements of Cash Flows
Net loss	$ (14,654)	$ (9,999)
Adjustments to reconcile net loss to cash flows used in operating activities:
Depreciation	130	98
Loss on disposal of plant and equipment		63
Stock-based compensation expense, net	1,821	907
Amortization of warrants for service agreements	240	160
Changes in assets and liabilities
Accounts receivable	(59)
Other current assets	(179)	(321)
Accounts payable and accrued expenses	946	(574)
Net cash used in operations	(11,755)	(9,666)
Cash flows used in investing activities:
Purchases of property and equipment	(82)	(132)
Net cash used in investing activities	(82)	(132)
Cash flows provided by financing activities:
Net proceeds from the sale of common stock	57,591	20,620
Net cash provided by financing activities	57,591	20,620
Effect of exchange rate changes on cash	(171)	61
Net increase in cash and cash equivalents	45,583	10,883
Cash and cash equivalents - beginning of period	14,224	6,563
CASH AND CASH EQUIVALENTS - END OF PERIOD	$ 59,807	$ 17,446