Stockholders' Equity (Details Textual) - USD ($)	1 Months Ended				12 Months Ended
	Oct. 29, 2014	Oct. 28, 2014	Mar. 03, 2014	Feb. 27, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	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	81,656,763
Proceeds from Issuance of Common Stock					$ 0	$ 22,024,760	$ 0
Proceeds from Stock Options Exercised					$ 701,705	$ 462,218	$ 46,221
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]
Stockholders' Equity [Line Items]
Exercise of Over-Allotment Options to Purchase Common Stock	1,034,483
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
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					863,933	760,399	155,500
Proceeds from Stock Options Exercised					$ 701,700	$ 462,200	$ 46,200
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					863,933	760,399	155,500
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