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Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2019
Supplemental Cash Flow Information [Abstract]  
Schedule of supplemental cash flow information
 
Year Ended December 31,
 
2019
 
2018
 
(in thousands)
Cash paid for
 
 
 
Interest
$
4,324

 
$
3,989

Income tax
—

 
—

Supplemental schedule of non-cash investing and
financing activities
 
 
 
Finance leases on equipment
$
2,754

 
$
3,829

Change in accounts payable related to capital expenditures
$
—

 
$
(599
)