Long-Term Debt (Schedule Of Future Debt Payments) (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Long-Term Debt [Line Items]
2017	$ 55
2018	2,447
Total long-term debt	2,502
Bank Credit Facility [Member]
Long-Term Debt [Line Items]
2018	2,400
Total long-term debt	2,400
Company Vehicles [Member]
Long-Term Debt [Line Items]
2017	55
2018	47
Total long-term debt	$ 102