Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Condensed Consolidated Statements of Cash Flows
Net loss	$ (8,619)	$ (6,703)
Adjustments to reconcile net loss to cash flows used in operating activities:
Depreciation and amortization	83	63
Loss on disposal of plant and equipment		63
Stock-based compensation expense	838	621
Amortization of warrants for service agreements	240
Changes in assets and liabilities
Other current assets	(371)	(286)
Accounts payable and accrued expenses	258	(573)
Net cash used in operations	(7,571)	(6,815)
Cash flows used in investing activities:
Purchases of property and equipment	(17)	(107)
Net cash used in investing activities	(17)	(107)
Cash flows provided by financing activities:
Net proceeds from the sale of common stock	14,910	2,068
Net cash provided by financing activities	14,910	2,068
Effect of exchange rate changes in cash	(20)	63
Net decrease in cash and cash equivalents	7,302	(4,791)
Cash and cash equivalents - beginning of period	14,224	6,563
CASH AND CASH EQUIVALENTS - END OF PERIOD	$ 21,526	$ 1,772