Stockholders' Equity (Details) (USD $)	0 Months Ended							3 Months Ended
	May 07, 2013	Mar. 27, 2013	Jan. 11, 2013	Dec. 18, 2012	Dec. 14, 2012	Apr. 05, 2012	Mar. 14, 2012	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Jul. 20, 2012
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.03			$ 0.03			$ 0.05	$ 0.03		$ 0.05
Stock Issued During Period, Shares, New Issues			750,000		5,000,000
Proceeds from Issuance of Common Stock			$ 3,591,000		$ 23,947,000			$ 3,591,000		$ 0
Additional Shares, sold in public offering, by stockholders					300,075
Common stock, par value								$ 0.0001		$ 0.0001	$ 0.0001
Preferred Stock, Par or Stated Value Per Share								$ 0.0001		$ 0.0001
Dividends, Common Stock, Cash		$ 486,000				$ 518,000			$ 464,000
Series A Junior Participating Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Par or Stated Value Per Share											$ 0.0001
Class of Warrant or Right, Exercise Price of Warrants or Rights											27
Dividend Declared [Member]
Class of Stock [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights											1