Long-Term Debt (Schedule Of Long-Term Debt To Unrelated Entities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Note payable to financial institution, with interest only payment until maturity	$ 1,012	$ 734
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 $10	160	155
Total long-term debt	1,172	889
Less current maturities	(65)	(65)
Long-term debt, less current maturities	1,107	$ 824
Periodic payments including interest, insurance and maintenance	$ 10
Maximum [Member]
Debt Instrument [Line Items]
Interest rate per annum	8.25%
Minimum [Member]
Debt Instrument [Line Items]
Interest rate per annum	5.50%