Common Stock Warrant (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Class of Warrant or Right [Line Items]
Warrants issued	67,314
Warrant, value	$ 1,100
Warrant exercise period	5 years
Exercise price of warrant	$ 16.10
Common Stock
Class of Warrant or Right [Line Items]
Warrants issued	1,152,125
Series B Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Warrants issued	2.00
Warrant, value	700
Warrant, shares	28,000
Exercise price of warrant	$ 1.85
Preferred stock, share authorized	480,000	480,000
Common Stock
Class of Warrant or Right [Line Items]
Warrants issued	3.25
Warrant, value	$ 700
Warrant, shares	28,000