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STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE, Stock Plans and Share-Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stockholders Equity And Share Based Compensation Expense [Abstract]
Common stock reserved for future issuance (in shares)	5,097
Common Stock, Capital Shares Reserved for Future Issuance 2012 Inducement	2,000
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	$ 1,835	$ 2,392
Unrecognized share-based compensation expense	13,133
Weighted-average term of unrecognized share-based compensation expense, Stock Options	2 years 8 months 12 days
Weighted-average term of unrecognized share-based compensation expense, Restricted Stock	2 years 3 months 18 days
Costs of sales [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	167	372
Research and development [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	329	367
Selling, general and administrative [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	$ 1,339	$ 1,653

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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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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