Warrants (Details textual) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Stock Issued During Period, Value, New Issues	$ 30,197,000
Stockholders Equity Note, Stock Split, Conversion Ratio	1.1533
Change in fair value recorded in other income (expense)	(1,800,000)	0
Warrants Not Settleable in Cash [Member]
Class of Stock [Line Items]
Warrants Exercised During Period	698,967
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding	8,700,000	0
Stock Purchase Agreement 2013 [Member]
Class of Stock [Line Items]
Stock Issued During Period Private Placement Shares	6,400,000
Warrants Issued During Period Private Placement	3,200,000
Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues	0
Stock Issued During Period, Value, New Issues	0
Stock Issued During Period Shares Warrants Exercised	563,834	1,397,939
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues	0
Stock Issued During Period, Value, New Issues	0
2013 PIPE investors [Member]
Class of Stock [Line Items]
Number Of Investors	17
Stock Issued During Period, Shares, New Issues	12,100,000
Equity Issuance, Per Share Amount	$ 0.25
Stock Issued During Period, Value, New Issues	3,000,000
Warrants to purchase common shares	6,048,000
Warrant Exercise Price	$ 0.33
Warrant Expiry Period	5 years
Merger Agreement [Member]
Class of Stock [Line Items]
Stockholders Equity Note, Stock Split, Conversion Ratio	1.1533
Merger Agreement [Member] | Warrants Not Settleable in Cash [Member]
Class of Stock [Line Items]
Warrants Exercised During Period	270,000
Warrants Outstanding During Period	6,000,000
Change in fair value recorded in other income (expense)		$ 1,800,000