Stockholders' Equity (Details Textual) (USD $)	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 28, 2014	Mar. 03, 2014	Feb. 27, 2014	Oct. 29, 2014	Oct. 23, 2014	Feb. 26, 2014
Stockholders' Equity [Line Items]
Common Stock, Shares Authorized	110,000,000	110,000,000
Common Stock, Par Or Stated Value Per Share	$ 0.001	$ 0.001
Common Stock, Shares, Outstanding	81,656,763	63,907,357
Proceeds from Issuance of Common Stock	$ 22,024,760	$ 0	$ 0
Proceeds from Stock Options Exercised	462,218	46,221	51,203
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Preferred Stock, Shares Issued	2,045,714	2,045,714
Convertible Preferred Stock, Shares Reserved for Future Issuance	7,945,286
Public Offering [Member] | B. Riley Co., LLC the Underwriter” and Craig-Hallum Co-Manager” [Member]
Stockholders' Equity [Line Items]
Common Stock, Par Or Stated Value Per Share								$ 0.001
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized								6,896,552
Stock Issued During Period, Shares, New Issues				6,896,552
Sale of Stock, Price Per Share				$ 1.45
Proceeds from Issuance or Sale of Equity				11,500,000
Proceeds from Issuance of Common Stock				10,800,000
Exercise of Over-Allotment Options to Purchase Common Stock							1,034,483
Public Offering [Member] | B. Riley Co., LLC the Underwriter” [Member]
Stockholders' Equity [Line Items]
Common Stock, Par Or Stated Value Per Share									$ 0.001
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized									7,876,497
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized						1,181,475
Stock Issued During Period, Shares, New Issues					9,057,972
Sale of Stock, Price Per Share					$ 1.38
Proceeds from Issuance or Sale of Equity					12,500,000
Proceeds from Issuance of Common Stock					11,700,000
Employee Stock Option [Member]
Stockholders' Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	760,399	155,500	525,000
Common Stock [Member]
Stockholders' Equity [Line Items]
Stock Issued During Period, Shares, New Issues	16,989,007
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	760,399	155,500	525,000
Common Stock [Member] | Public Offering [Member] | B. Riley Co., LLC the Underwriter” [Member]
Stockholders' Equity [Line Items]
Payments for Repurchase of Initial Public Offering				$ 200,000	$ 300,000
Series A Preferred Stock [Member]
Stockholders' Equity [Line Items]
Preferred Stock, Shares Issued	2,045,714