Stock Option Plans - Plans Information (Details)	12 Months Ended	0 Months Ended	12 Months Ended			12 Months Ended		0 Months Ended	12 Months Ended										12 Months Ended
	Dec. 31, 2013	Dec. 01, 2011 Restricted stock awards	Dec. 31, 2013 Restricted stock units	Dec. 31, 2013 1999 and 2009 Plans	Dec. 31, 2012 1999 and 2009 Plans	Dec. 31, 2013 1999 and 2009 Plans Stock options	Dec. 31, 2013 1999 and 2009 Plans Stock options Maximum	Sep. 20, 2010 1999 and 2009 Plans Stock options Board member Cliff vesting on first anniversary of grant	Dec. 31, 2013 1999 and 2009 Plans Stock options Grantee other than individual owning more than 10% of outstanding stock	Dec. 31, 2013 1999 and 2009 Plans Stock options Grantee other than individual owning more than 10% of outstanding stock Cliff vesting on first anniversary of grant	Dec. 31, 2013 1999 and 2009 Plans Stock options Grantee other than individual owning more than 10% of outstanding stock Ratable vesting after first anniversary of grant	Dec. 31, 2013 1999 and 2009 Plans Stock options Individual owning more than 10% of outstanding stock Minimum	Dec. 31, 2013 1999 and 2009 Plans Incentive stock options Minimum	Dec. 31, 2013 1999 and 2009 Plans Incentive stock options Individual owning more than 10% of outstanding stock	Dec. 31, 2013 1999 and 2009 Plans Non-statutory stock options Minimum	Dec. 31, 2013 2010 Plan	Dec. 31, 2013 2010 Plan Maximum	Dec. 31, 2013 2010 Plan Minimum	Dec. 31, 2013 2010 Plan Incentive stock options Maximum	Dec. 31, 2013 2010 Plan Incentive stock options Individual owning more than 10% of outstanding stock Maximum	Dec. 31, 2013 2010 Plan Incentive stock options Individual owning more than 10% of outstanding stock Minimum	Dec. 31, 2012 2010 Plan Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting rate, percentage per year over 5 years						20.00%
Minimum vesting rate, period						5 years
Award expiration period							10 years		10 years					5 years					10 years	5 years
Award cliff vesting percentage								33.33%		25.00%
Award ratable vesting period											36 months
Exercise price as percentage of fair market value per share												110.00%	100.00%		85.00%						110.00%
Stock Based Compensation Plan, Individual Ownership Threshold	10.00%
Stock options granted (in shares)	2,394,000
Number of shares issuable under plan				0	0											2,015,533
Number of shares authorized under plan																		3,680,480
Number of shares to be added from 1999 and 2009 Plans																	5,614,369
Additional issuable shares authorization, annual increase, maximum number of shares																5,500,000
Additional issuable shares authorization, annual increase, percentage of outstanding stock, maximum																4.50%
Awards granted (in shares/units)		7,500	173,000																			172,465
Awards vested (in shares/units)			214,000