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Long-Term Debt and Credit Facility (Tables)
12 Months Ended
Dec. 31, 2019
Debt Disclosure [Abstract]  
Components of long-term debt
Long-term debt is as follows (in thousands): 
 
December 31,
 
2019
 
2018
Long-term debt, classified as current:
 
 
 
Borrowings under revolving credit facility
$

 
$
49,731