Description of Business and Basis of Presentation (Details 1) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Outstanding options to purchase common stock
Schedule of instruments convertible into common shares that are not included in the denominator used in the diluted net income (loss) per share calculation because to do so would be anti-dilutive
Anti-dilutive, shares	543	920	743	549
Restricted Stock Awards
Schedule of instruments convertible into common shares that are not included in the denominator used in the diluted net income (loss) per share calculation because to do so would be anti-dilutive
Anti-dilutive, shares	455	337	455	338
Restricted stock unit awards
Schedule of instruments convertible into common shares that are not included in the denominator used in the diluted net income (loss) per share calculation because to do so would be anti-dilutive
Anti-dilutive, shares	0	20	13	17