Income Taxes (Details 1)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal statutory rate	34.00%	34.00%
Stock based awards	(7.00%)	2.10%
State taxes	1.50%	6.30%
Other permanent differences	(1.80%)	(0.80%)
Impact of uncertain tax positions	(3.00%)	(1.20%)
Valuation allowance	(8.50%)	(1.50%)
Tax rate change	14.70%	0.00%
Other	(0.20%)	(0.10%)
Effective federal income tax rate	29.70%	38.80%