Fair Value of Financial Instruments, Significant Unobsesrvable input assumptions of Level 3 valuations (Details) (Level 3 [Member])	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Historical Volatility (in hundredths)	52.00%	62.00%
Expected Term (in years)	0 years 8 months 12 days	0 years 4 months 24 days
Risk-free interest rate (in hundredths)	0.08%	0.08%
Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Historical Volatility (in hundredths)	61.00%	76.00%
Expected Term (in years)	1 year 7 months 6 days	2 years 1 month 6 days
Risk-free interest rate (in hundredths)	0.34%	0.44%