Stockholders' Equity and Redeemable Convertible Preferred Stock (Details 1) - Warrant [Member]	6 Months Ended
	Jun. 30, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding at beginnning	2,304,888
Exercised	(200,000)
Expired	(853,179)
Outstanding at ending	1,251,709
Exercisable at ending	1,251,709
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding at beginnning | $ / shares	$ 7.98
Exercised | $ / shares	3.8
Outstanding at ending | $ / shares	10.15
Exercisable at ending | $ / shares	$ 10.15
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Roll Forward]
Outstanding at beginnning | $
Outstanding at ending | $
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Remaining Contractual Life [Roll Forward]
Outstanding at beginnning	2 years 9 months 29 days
Outstanding at ending	4 years 5 months 1 day
Exercisable at ending	4 years 5 months 1 day