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Consolidated Statements of Operations and Comprehensive Loss (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stock-based compensation expense (in Dollars)	$ 194	$ 83
Selling, General and Administrative Expenses [Member]
Stock-based compensation expense (in Dollars)	192	66
Research and Development Expense [Member]
Stock-based compensation expense (in Dollars)	$ 2	$ 17

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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