Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

The following table presents the historical computation of basic and diluted net loss per share:


	Years Ended December 31,
	2010			2011			2012
	(In thousands, except share and per share amounts)
Historical net loss per share
Numerator:
Net loss attributable to common stockholders	$	(17,989	)	$	(15,738	)	$	(46,274	)
Denominator:
Weighted average shares outstanding, basic and diluted		3,329,666			3,329,666			6,283,238
Net loss per share, basic and diluted	$	(5.40	)	$	(4.73	)	$	(7.36	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The following potentially dilutive securities have been excluded from the computations of diluted weighted average shares outstanding as of December 31, 2010, 2011 and 2012, as they would have been anti-dilutive:


	December 31,
	2010		2011		2012
	(In thousands)
Shares issuable upon conversion of preferred stock		4,808		4,808		—
Shares issuable pursuant to accumulated preferred stock dividend		613		959		—
Options		1,128		1,309		1,526
Restricted stock units		—		—		176
Warrants to purchase common stock		1,340		1,233		1,162
Total		7,889		8,309		2,864