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STOCK-BASED COMPENSATION (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Selling, general and administrative expense
Stock-based compensation expense:
Stock-based compensation expense	$ 350	$ 1,466
Research and development expense
Stock-based compensation expense:
Stock-based compensation expense	$ 4	$ 8

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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