Stockholders' Equity and Redeemable Convertible Preferred Stock (Details 3) - Non-Employee [Member] - USD ($) None in scaling factor is -9223372036854775296	6 Months Ended
	Jun. 30, 2015
Number of Shares
Outstanding at beginning of year	55,000
Options granted
Outstanding at end of year	55,000
Options vested and expected to vest	55,000
Options vested and exercisable	55,000
Weighted Average Exercise Price
Outstanding at beginning of year	$ 5.16
Options granted
Outstanding at end of year	$ 5.16
Options vested and expected to vest	5.16
Options vested and exercisable	$ 5.16
Total Intrinsic Value
Outstanding at beginning of year
Outstanding at end of year
Weighted Average Remaining Contractual Life (in years)
Weighted average remaining contractual life Outstanding, Beginning Balance	6 years 4 months 24 days
Weighted average remaining contractual life Outstanding, Ending Balance	5 years 10 months 24 days
Options vested and expected to vest	5 years 10 months 24 days
Options vested and exercisable	5 years 10 months 24 days