Common Stock Placements (Details) (Common Stock, USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013
Common Stock
Sale of stocks and warrants [Line Items]
Shares issued (in shares)	5,750,000	5,750,000
Share issue price (in dollars per share)	$ 6.80	$ 6.80
Proceeds from shares issued	$ 36,704
Legal fees paid for secondary offering	$ 194