Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Components Of Long-Term Debt) (Details)

v3.19.1
Long-Term Debt (Components Of Long-Term Debt) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Line Of Credit Facility And Long Term Debt [Line Items]    
Capital leases   $ 84
Total carrying amount of long-term debt $ 18,271 22,146
Less current portion   (41)
Long-term debt, net 18,271 22,105
Revolving Credit Facility [Member]    
Line Of Credit Facility And Long Term Debt [Line Items]    
Revolving credit facility (a) 18,271 $ 22,062
Credit facility current borrowing capacity 50,000  
Credit facility remaining borrowing capacity $ 32,000  
Interest rate during the year 3.9893% 3.8493%
Commitment fee 0.25%  
Revolving Credit Facility [Member] | LIBOR [Member]    
Line Of Credit Facility And Long Term Debt [Line Items]    
Variable interest rate 1.50%