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Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stock-based compensation expense	$ 147	$ 855	$ 230	$ 1,175
Selling, General and Administrative Expenses [Member]
Stock-based compensation expense	129	663	195	983
Research and Development Expense [Member]
Stock-based compensation expense	$ 18	$ 192	$ 35	$ 192

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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