Long-Term Debt (Schedule of Long-term Debt Instruments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Line of Credit Facility [Line Items]
Note payable to financial institution, with interest only payment until maturity	$ 3,257	$ 10,138
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	200	208
Total long-term debt	3,457	10,346
Less current maturities	(82)	(100)
Long-term debt, less current maturities	3,375	10,246
Debt Instrument, Periodic Payments Including Insurance And Maintenance	$ 20
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%