Shareholder Rights Plan and Capital Structure (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended		12 Months Ended
	Jan. 08, 2013	Dec. 11, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity [Abstract]
Preferred stock, shares outstanding			0	0
Public offering, common stock shares (shares)		6,249,234
Public offering, by company (shares)		2,500,000
Public offering, by selling shareholders (shares)		3,749,234
Public offering, price per share (usd per share)		$ 6.39
Additional shares, overallotment option (shares)	687,385
Public offering, net proceeds	$ 4,100	$ 14,700	$ 4,118	$ 14,682	$ 0