Common Stock (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Incremental Shares Issued [Member]
Common Stock [Line Items]
Exercise price per share	$ 4.01	$ 4.01
Market price per share	$ 5.66	$ 6.53
In the money shares exercise of options, net	53,136	15,822
Realized value, options exercised	$ 124,000	$ 103,000
Options exercised	75,000	41,000
Executive Officer [Member] | Class A Nonvoting Common Stock [Member]
Common Stock [Line Items]
Stocks granted	217,890	155,925
Realized value, options exercised	132,000	136,000
Options exercised	62,500	95,000
Cash received from exercise of stock options	$ 249,000	$ 308,000