Long-Term Debt (Schedule Of Long-Term Debt To Unrelated Entities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Note payable to financial institution, with interest only payment until maturity	$ 2,107	$ 3,257
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	194	200
Total long-term debt	2,301	3,457
Less current maturities	(78)	(82)
Long-term debt, less current maturities	2,223	3,375
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%