CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical)	Jun. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Shareholders' equity
Common Stock, shares authorized	12,000,000		12,000,000
Common Stock, shares issued	4,672,979	4,665,690	4,672,979
Common Stock, shares outstanding	4,453,528	4,446,239	4,453,528