June 2012 Stock Sale (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Jun. 30, 2012 transaction	Dec. 31, 2014	Jun. 07, 2012	Jun. 05, 2012
Subsidiary, Sale of Stock [Line Items]
Legal fees	$ 819,000
Piper
Subsidiary, Sale of Stock [Line Items]
Common shares sold				0.4	2.7
Sale of common stock, price per share				$ 13.00	$ 13.00
Number of transactions		2
Gross proceeds		40,300,000
Legal fees		100,000
Professional fees			$ 200,000