Long-Term Debt (Schedule Of Long-Term Debt To Unrelated Entities) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Note payable to financial institution, with interest only payment until maturity	$ 2,312	$ 869
Less unamortized debt issuance cost	(8)	(10)
Note payable to a financial institution, net of unamortized debt issuance cost	2,304	859
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	133	152
Total long-term debt	2,437	1,011
Less current maturities	(61)	(65)
Long-term debt, less current maturities	2,376	$ 946
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%