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Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Common Shares Excluded from Net Loss

The following table sets forth the potentially dilutive common shares excluded from the calculation of net loss per common share because their inclusion would be anti-dilutive (in thousands):

	December 31,
	2013			2012
Warrants to purchase common stock	14,850			13,216
Options to purchase common stock	13,159			7,672
Total	28,009			20,888

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Schedule Of Earning Per Share To Common Shareholders Table [Text Block]

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