Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Income Taxes
Income tax expense	$ 164,000	$ 48,000	$ 239,000	$ 106,000
Income tax rate, percentage	39.60%	40.70%	40.90%	36.40%
Unrecognized tax benefits	$ 486,000		$ 486,000		$ 486,000
Unrecognized tax benefits, if recognized, that would affect the effective income tax rates of future periods	$ 486,000		$ 486,000