Stockholders' Equity (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Number of Shares
Outstanding at end of year	5,298,877	2,013,876
Employee
Number of Shares
Outstanding at beginning of year	1,983,877	7,163
Employee Options granted	3,260,000	1,976,714
Outstanding at end of year	5,243,877	1,983,877	7,163
Options vested and expected to vest	5,243,877
Options vested and exercisable	4,776,252
Weighted Average Exercise Price
Outstanding at beginning of year	$ 7.14	$ 22.35
Employee Options granted	$ 3.65	$ 7.08
Outstanding at end of year	$ 4.97	$ 7.14	$ 22.35
Options vested and expected to vest	$ 4.97
Options vested and exercisable	$ 5.10
Aggregate Intrinsic Value
Aggregate intrinsic value of share outstanding
Employee Options granted
Options vested and expected to vest
Options vested and exercisable
Weighted Average Remaining Contractual Life
Weighted average remaining contractual life of share outstanding	6 years		4 years 4 months 24 days
Weighted average remaining contractual life of share Options granted	9 years 2 months 12 days		9 years 3 months 18 days
Options vested and expected to vest	6 years
Options vested and exercisable	6 years 1 month 6 days