Income Taxes (Details 1)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Statutory federal income tax rate	34.00%	34.00%
State income tax rate (net of federal benefit)	(0.10%)	(0.10%)
Non-deductible expenses	(0.40%)	(0.70%)
Change in valuation allowance	(28.90%)	(40.70%)
Foreign rate differential	(2.80%)	3.60%
Return to accrual difference true-ups	(0.40%)	2.40%
Other	0.50%	2.10%
Combined effective tax rate	1.90%	0.60%