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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Allowance for doubtful accounts receivable $ 401 $ 389
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 1,000 1,000
Preferred stock, shares issued 0 0
Common Stock Class A [Member]
    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 20,000,000 20,000,000
Common stock, shares issued 2,386,107 2,375,307
Common stock, shares outstanding 2,386,107 2,375,307
Common Stock Class B [Member]
    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 10,000,000 10,000,000
Common stock, shares issued 10,000,000 10,000,000
Common stock, shares outstanding 10,000,000 10,000,000