Long-Term Debt (Schedule Of Long-Term Debt To Unrelated Entities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Note payable to financial institution, with interest only payment until maturity	$ 2,238	$ 869
Less unamortized debt issuance cost	(9)	(10)
Note payable to a financial institution, net of unamortized debt issuance cost	2,229	859
Installment notes bearing interest at the rate of 4.16% to 4.60% per annum collateralized by vehicles with monthly payments including interest, insurance and maintenance of approximately $10	165	152
Total long-term debt	2,394	1,011
Less current maturities	(73)	(65)
Long-term debt, less current maturities	2,321	$ 946
Periodic payments including interest, insurance and maintenance	$ 10
Maximum [Member]
Debt Instrument [Line Items]
Interest rate per annum	4.60%
Minimum [Member]
Debt Instrument [Line Items]
Interest rate per annum	4.16%