Quarterly report pursuant to Section 13 or 15(d)

Leases - Narrative (Details)

v3.20.1
Leases - Narrative (Details) - USD ($)
$ in Thousands
6 Months Ended
Jul. 01, 2019
Jun. 30, 2019
Jun. 30, 2018
Jan. 31, 2019
Jan. 01, 2019
Oct. 01, 2018
Mar. 31, 2013
Finance Lease, Cost [Abstract]              
Discount Rate ( as a percent )   4.30%          
Lease Term ( in years )   3 months 18 days          
ROU Asset   $ 3,100          
Right-of-Use Asset Amortization   0          
Interest Expense   $ 70          
Discount Rate ( as a percent )   6.20%          
Lease term ( in years )   3 years 11 months 5 days          
ROU asset   $ 1,800          
Operating Lease, Liability   1,755          
Operation Lease Accumulated Amortization   200          
Operating Lease Expense   300 $ 800        
Short-term Lease Expense   600          
Short-term Lease Commitment   8,300          
Operating Lease, Payments   300          
Measurement Of Finance Lease   200          
Finance Lease, Principal Payments   123 0        
Present value of future lease payments (lease obligation)   2,980          
Real Estate Lease              
Finance Lease, Cost [Abstract]              
Lease term ( in years )         4 years    
Operating Lease, Term of Contract ( In years )             10 years
Operating Lease, Renewal Term ( in years )             10 years
Crew Camp Lease              
Finance Lease, Cost [Abstract]              
ROU asset   500          
Operating Lease, Liability   500          
Operating Lease, Cost   $ 80          
Operating Lease, Term of Contract ( In years )       4 years      
Ground Lease [Member]              
Finance Lease, Cost [Abstract]              
Lease Term ( in years )   7 months 6 days          
Lessee, Finance Lease, Term of Contract           10 years  
Accounting Standards Update 2016-02              
Finance Lease, Cost [Abstract]              
Operating Lease, Liability         $ 2,000    
Present value of future lease payments (lease obligation)         $ 3,100    
Subsequent event              
Finance Lease, Cost [Abstract]              
Disposal Group, Including Discontinued Operation, Gross Profit (Loss) $ 5,000            
Real Estate Lease              
Finance Lease, Cost [Abstract]              
Operating Lease, Payments   $ 200 $ 200