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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

9 Months Ended

Sep. 30, 2013

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Schedule of components of restricted cash

		September 30,			December 31,
(In thousands)		2013			2012
Certificate of deposit for unused equipment line of credit		$	530		$	530
Certificate of deposit for credit card purchases		265			264
		$	795		$	794

Summary of allocation of stock-based compensation expense related to share-based payment awards

		Three Months Ended						Nine Months Ended
		September 30,						September 30,
(In thousands)		2013			2012			2013			2012
Research and development		$	483		$	594		$	1,394		$	1,861
Restructuring charges		—			—			28			—
General and administrative		739			669			2,034			2,155
Stock-based compensation expense included in operating expenses		$	1,222		$	1,263		$	3,456		$	4,016

Schedule of assumptions used to estimate the fair value of stock options granted

		Nine Months Ended September 30,
		2013		2012
Dividend yield		None		None
Expected volatility range		0.742 to 0.759		0.631 to 0.726
Risk-free interest rate range		0.80% to 1.81%		0.81% to 1.25%
Expected term		6 yrs		6 yrs

Schedule of assumptions used to estimate the fair value of employee stock purchases under the Purchase Plan

		Nine Months Ended September 30,
		2013		2012
Dividend yield		None		None
Expected volatility range		0.506 to 1.391		0.458 to 0.774
Risk-free interest rate range		0.09% to 0.21%		0.06% to 0.21%
Expected term range		6 - 12 mos		6 - 12 mos

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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