Fair Value of Financial Assets and Liabilities (Details 4) - Number	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Risk Free Interest Rate [Member]
Measurement input	0.0248	0.0198
Expected Volatility [Member]
Measurement input	0.7500	0.7500
Expected Volatility [Member] | Minimum [Member]
Measurement input	0.7203	1.0000
Expected Volatility [Member] | Maximum [Member]
Measurement input	1.0313	1.3221
Expected Term [Member]
Contractual life (in years)	2 months 1 day	1 year 6 months
Expected Term [Member] | Minimum [Member]
Contractual life (in years)	1 year 11 months 8 days	2 years 11 months 8 days
Expected Term [Member] | Maximum [Member]
Contractual life (in years)	2 years 22 days	3 years 22 days