Severance Arrangements Severance Arrangements (Notes)	12 Months Ended
Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Severance Arrangements [Text Block]	Severance Arrangements In September 2014, two co-founders retired from full-time employment with the Company, and two other non-executive members of management were terminated from the Company. Pursuant to the severance arrangements provided in their respective employment and separation agreements, we recognized severance-related expenses of approximately $1,488 during the year ended December 31, 2014. This severance expense includes salary, payroll taxes and bonus payments to which the former employees were entitled under their respective arrangements. We expect to pay the severance expense, of which $1,083 was accrued as of December 31, 2014, over the next 12 months. In connection with the retirement of the two co-founders, and under the terms of their employment agreements, all unvested stock options became exercisable. As such, we recognized share-based compensation expense of $865 in the year ended December 31, 2014 related to the acceleration of vesting of these stock options. In addition, these former employees entered into consulting arrangements to provide certain transition services to the Company beginning in October 2014 and were granted stock options to purchase 33 shares of the Company’s common stock in connection with such arrangements. (See Note 14 for further details of these share-based compensation arrangements.)

Severance Arrangements

In September 2014, two co-founders retired from full-time employment with the Company, and two other non-executive members of management were terminated from the Company. Pursuant to the severance arrangements provided in their respective employment and separation agreements, we recognized severance-related expenses of approximately $1,488 during the year ended December 31, 2014. This severance expense includes salary, payroll taxes and bonus payments to which the former employees were entitled under their respective arrangements. We expect to pay the severance expense, of which $1,083 was accrued as of December 31, 2014, over the next 12 months.

In connection with the retirement of the two co-founders, and under the terms of their employment agreements, all unvested stock options became exercisable. As such, we recognized share-based compensation expense of $865 in the year ended December 31, 2014 related to the acceleration of vesting of these stock options. In addition, these former employees entered into consulting arrangements to provide certain transition services to the Company beginning in October 2014 and were granted stock options to purchase 33 shares of the Company’s common stock in connection with such arrangements. (See Note 14 for further details of these share-based compensation arrangements.)