Warrants Outstanding and Exercisable (Details) (USD $)	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Warrant, exercise price	$ 3.08	$ 2.47	$ 3.07	$ 7.28
Warrants, Outstanding as of end of period	6,526,000	2,100,000	8,091,000	5,131,000
Warrants, Exercisable at end of period	6,526,000
Warrants exercisable, weighted average exercise price			$ 3.08
2.13
Warrant, exercise price	$ 2.13
Warrants, Outstanding as of end of period	1,000,000
Warrants outstanding, weighted average remaining contractual life, years	$ 0.39
Warrants outstanding, weighted average exercise price	$ 2.13
Warrants, Exercisable at end of period	1,000,000
Warrants exercisable, weighted average exercise price	$ 2.13
2.24
Warrant, exercise price	$ 2.24
Warrants, Outstanding as of end of period	2,100,000
Warrants outstanding, weighted average remaining contractual life, years	$ 2.47
Warrants outstanding, weighted average exercise price	$ 2.24
Warrants, Exercisable at end of period	2,100,000
Warrants exercisable, weighted average exercise price	$ 2.24
2.47
Warrant, exercise price	$ 2.47
Warrants, Outstanding as of end of period	2,148,000
Warrants outstanding, weighted average remaining contractual life, years	$ 4.21
Warrants outstanding, weighted average exercise price	$ 2.47
Warrants, Exercisable at end of period	2,148,000
Warrants exercisable, weighted average exercise price	$ 2.47
6.24
Warrant, exercise price	$ 6.24
Warrants, Outstanding as of end of period	1,278,000
Warrants outstanding, weighted average remaining contractual life, years	$ 1.88
Warrants outstanding, weighted average exercise price	$ 6.24
Warrants, Exercisable at end of period	1,278,000
Warrants exercisable, weighted average exercise price	$ 6.24