Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Treasury stock, shares	528,341	528,341
Common Stock
Common stock, par value	0.01	0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	9,680,825	8,972,795
Common Class B Stock
Common stock, par value	0.01	0.01
Common stock, shares authorized	5,000,000	5,000,000
Common stock, shares issued	3,194,229	3,597,318