Long-Term Debt (Schedule Of Long-Term Debt To Unrelated Entities) (Details) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Line of Credit Facility [Line Items]
Note payable to financial institution, with interest only payment until maturity	$ 6,482,000	$ 10,138,000
Installment notes bearing interest at the rate of 5.5% to 8.25% per annum collateralized by vehicles with monthly payments including interest, insurance and maintenance of approximately $20,000	157,000	208,000
Total long-term debt	6,639,000	10,346,000
Less current maturities	(84,000)	(100,000)
Long-term debt, less current maturities	6,555,000	10,246,000
Periodic payments including interest, insurance and maintenance	$ 20,000
Maximum [Member]
Line of Credit Facility [Line Items]
Interest rate per annum	8.25%
Minimum [Member]
Line of Credit Facility [Line Items]
Interest rate per annum	5.50%