Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Provision for income taxes
Provision for income taxes	$ 142	$ 126	$ 454	$ 96
Income tax benefit for current year losses due to maintaining a full valuation allowance	0		0
Unrecognized tax benefits	1,200		1,200
Unrecognized tax benefits that would impact effective tax rate	0		0
Components of deferred tax assets and liabilities
Change in total unrecognized tax benefits	$ 0		$ 0