Short And Long-Term Debt (Summary Of Short And Long-Term Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Unamortized finance costs	$ (107)	$ (139)
Total Debt	13,011	11,361
Less: Current Maturities	(2,063)	(2,040)
Total long-term debt	10,948	9,321
Domestic Term-Loan [Member]
Debt Instrument [Line Items]
Total Debt	6,000	6,250
Domestic Asset-based Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total Debt	5,865	4,000
Capital Expenditure Loan Facility [Member]
Debt Instrument [Line Items]
Total Debt
Foreign Overdraft And Letter Of Credit Facility [Member]
Debt Instrument [Line Items]
Total Debt	$ 1,253	$ 1,250