Notes Payable and Long-Term Debt (Short-Term Debt) (Details) (USD $)	0 Months Ended			12 Months Ended
	Mar. 19, 2009	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Unsecured Debt [Member]
Short-term Debt [Line Items]
Line of credit with variable interest rate equal to the WSJ prime rate, subject to a 5.0% floor; Maturity January 2013. Interest payments due quarterly. Unsecured.		$ 125,000	$ 485,000
Current portion of installment note payable November 2013 with variable interest rate equal to the WSJ prime rate plus 1%; Unsecured		1,167,000	0
Short-term notes payable		$ 1,292,000	$ 485,000
Interest rate description				WSJ
Interest rate at period end		5.00%		5.00%
Payment terms				Interest payments due quarterly
Description of variable rate basis	three-month LIBOR			WSJ
Basis spread on variable rate	3.40%			1.00%