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Stock-Based Compensation (Details 3) (Warrant [Member], USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Warrant [Member]
   
Summary of all stock option plans    
Number of Options/Warrants Outstanding, Beginning Balance 3,335,073us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
828,573us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Warrants, Granted     
Warrants, Expired/cancelled     
Warrants, Exercised     
Number of Options/Warrants Outstanding, Ending Balance 3,335,073us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
3,335,073us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Average Exercise Price, Outstanding, Beginning Balance $ 4.45us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 2.39us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Average Exercise Price, Granted     
Weighted Average Exercise Price, Expired/cancelled     
Weighted Average Exercise Price, Exercised     
Weighted Average Exercise Price, Outstanding, Ending Balance $ 4.45us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 4.45us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Average Remaining Contractual Life, Outstanding and exercisable, January 1, 2015 8 months 9 days 11 months 5 days